HTP VFC P Series Guide

Ultra-Thin Hydronic Fan Coil
Metal Face
User’s Information Manual
Installation
Start-Up
Maintenance
Parts
Warranty
For Residential and Commercial Use
VFC-*P** Models
* Denotes Model Size
** ”WV”Denotes White Models with Valve;“B” Denotes Black Models without Valve
This manual must only be used by a qualied installer / service technician. Read all instructions in this manual before installing.
Perform steps in the given order. Failure to do so could result in substantial property damage, severe personal injury, or death.
The manufacturer reserves the right to make product changes or updates without notice and will not be held liable for
typographical errors in literature.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
272 Duchaine Blvd. New Bedford, MA 02745 www.htproducts.com
lp-586 Rev. 000 Rel. 001 Date 2.12.18

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The following dened terms are used throughout this manual to
bring attention to the presence of hazards of various risk levels or to
important product information.
DANGER indicates an imminently hazardous situation which, if not
avoided, will result in serious personal injury or death.
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in personal injury or death.
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in moderate or minor personal injury.
CAUTION used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, may result in
property damage.
NOTICE is used to address practices not related to personal injury.
Foreword
This manual is intended to be used in conjunction with other literature
provided with the fan coil. This includes all related control information.
It is important that this manual, all other documents included in
this system, and additional publications including the Code for the
Installation of Heat Producing Appliances (latest version), be reviewed in
their entirety before beginning any work.
Installation should be made in accordance with the regulations of
the Authority Having Jurisdiction, local code authorities, and utility
companies which pertain to this type of water heating equipment.
Authority Having Jurisdiction (AHJ) – The AHJ may be a federal, state,
local government, or individual such as a re chief, re marshal, chief
of a re prevention bureau, labor department or health department,
building ocial or electrical inspector, or others having statutory
authority. In some circumstances, the property owner or his/her agent
assumes the role, and at government installations, the commanding
ocer or departmental ocial may be the AHJ.
NOTE: The manufacturer reserves the right to modify product technical
specications and components without prior notice.
For the Installer
This fan coil must be installed by qualied and licensed personnel. The
installer should be guided by the instructions furnished with the fan
coil, and by local codes and utility company requirements.
Installations Must Comply With:
Local, state, provincial, and national codes, laws, regulations, and
ordinances.
Code for the Installation of Heat Producing Appliances (latest version)
from American Insurance Association, 85 John Street, New York, NY
11038.
The latest version of the National Electrical Code, NFPA No. 70.
Part 1 - General Safety Information
This fan coil is approved for indoor installations only. Clearances:
6” top, 3.54” bottom, 1” sides, 16” front, and 0” back. This fan coil
has been approved for installation on combustible ooring. Install
the fan coil in a location where a leak will not result in damage to
the surrounding area. If such a location is not available, install an
auxiliary catch pan.
Installer - Read all instructions in this manual before installing.
Perform steps in the given order.
User - This manual is for use only by a qualied heating installer /
service technician. Have this fan coil serviced / inspected annually
by a qualied service technician.
NOTE: If the fan coil is exposed to the following, do not operate.
Immediately call a qualied service technician.
1. Fire
2. Damage
3. Water
Failure to adhere to these guidelines can result in substantial
property damage, electric shock, severe personal injury, or death.
Table of Contents
Part 1 - General Safety Information 2
A. When Servicing the Water Heating System 3
B. System Water 3
C. Freeze Protection 3
D. Notes 3
E. Fundamental Safety Rules 3
Part 2 - Prepare the Fan Coil 4
A. Included with the Fan Coil 4
B. Locating the Fan Coil 4
C. Water Chemistry Requirements 5
D. Information and Recommendations 5
Part 3 - Technical Specications 6
A. Specications 6
B. Dimensions 7
C. Description of Operation 7
Part 4 - Installation 8
A. Precautions 8
B. Positioning the Fan Coil 8
C. Mounting 8
D. Water Piping 9
E. Condensate Piping 10
F. Purging 11
Part 5 - Operation 11
A. Control Description 11
B. Setting the Temperature 12
C. Remote Control (Optional) Description 13
D. Using the Remote Control 13
E. Default Settings 14
F. Parameter List 14
Part 6 - Maintenance and Troubleshooting 14
A. Cleaning 14
B. Common Faults and Solutions 15
Part 7 - Wiring 15
Limited Five (5) Year Warranty 18
Customer Installation Record Form 20
NOTE: Obey all local codes. Obtain all applicable permits before
installing the fan coil.
NOTE: Install all system components and piping in such a manner
that does not reduce the performance of any re rated assembly.
Ensure the fan coil is properly grounded.

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Do not use this fan coil for anything other than its intended
purpose (as described in this manual). Doing so could result in
property damage and WILL VOID product warranty.
Do not put your ngers or other appendages into the fans or heat
exchanger of the fan coil.
Failure to adhere to these guidelines can result in substantial
property damage, electric shock, severe personal injury, or death.
If there is a strange smell emanating from the fan coil or it appears
to be operating improperly, turn o power to the unit and call a
qualied service technician to inspect it.
It is prohibited for the user to move, maintain, or repair the fan
coil. Only a qualied service technician should do so.
Ensure the fan coil has a devoted circuit breaker.
Ensure suitable fuses are used in the fan coil.
A. When Servicing the Water Heating System
To avoid electric shock, disconnect electrical supply before
performing maintenance or cleaning.
To avoid severe burns, allow fan coil and associated equipment to
cool before servicing.
C. Freeze Protection
NOTE: Consider piping and installation when determining fan
coil location. Place the fan coil as close to the hot water source as
possible in a location not prone to freezing.
Failure of the fan coil due to freeze related damage IS NOT covered
by product warranty.
NEVER use any toxic chemical, including automotive, standard
glycol antifreeze, or ethylene glycol made for hydronic (non-
potable) systems. These chemicals can attack gaskets and seals
in water systems, are poisonous if consumed, and can cause
personal injury or death.
D. Notes
• Power o the unit if it is not to be used for a prolonged period
of time. Drain the unit of water if there is no freeze protection
and a chance of freezing exists.
• Avoid setting cooling temperatures too low. Doing so is
inecient.
• Avoid prolonged contact with direct air ow.
E. Fundamental Safety Rules
Some fundamental safety rules that should be followed when using
a product that uses electricity and water are:
• DO NOT allow people to operate the fan coil unless they have
been educated in its operation.
• DO NOT allow children to operate the fan coil.
• DO NOT touch the fan coil with wet hands or body when
barefoot.
• DO NOT carry out any cleaning on the fan coil before turning
o the electricity at the circuit breaker.
• DO NOT modify the safety or adjustment devices without
explicit authorization from the manufacturer.
• DO NOT cut or knot the electrical cables coming out of the
fan coil.
• DO NOT poke ngers, appendages, or objects through the
inlet or outlet grills of the fan coil.
• DO NOT leave packing materials within the reach of children.
Immediately and properly dispose of packing materials.
• DO NOT climb onto the fan coil or rest any object on it.
• DO NOT touch the fan coil while it is operating, as the external
parts can reach temperatures greater than 158oF.
Failure to adhere to these guidelines can result in substantial
property damage, electric shock, severe personal injury, or death.
B. System Water
• If you have an old system with cast iron radiators, thoroughly
ush the system (without fan coil connected) to remove
sediment. The fan coil can be damaged by build-up or
corrosion due to sediment. The manufacturer recommends
a suction strainer in this type of system.
• Do not use petroleum-based cleaning or sealing compounds
in the system. Gaskets and seals in the system may be
damaged, possibly resulting in substantial property damage.
• Do not use “homemade cures” or “patent medicines”.
Substantial property damage, damage to the fan coil, and/
or serious personal injury may result.
• Addition of oxygen from make-up water can cause internal
corrosion in system components. Leaks in the fan coil or
piping must be repaired at once.
• Do not leave the room closed for prolonged periods. Periodically
open doors or windows to allow fresh air to circulate within the
space.
• If water leaks from the fan coil, turn the fan coil “OFF” and, if
possible, valve the unit o from the system. DO NOT attempt to
service. Call for service as soon as possible.
• When replacing components, use only genuine replacement
parts from the manufacturer.

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COLD WEATHER HANDLING - If the fan coil has been stored in
a very cold location (BELOW 0oF) before installation, handle with
care until the components come to room temperature. Failure to
do so could result in damage to the fan coil.
Locate the fan coil where any leakage will not result in damage
to surrounding areas or lower oors of the building. The fan coil
should be located near a oor drain or installed in a drain pan.
Leakage damages ARE NOT covered by warranty.
NOTE: To save on heating costs and improve energy eciency keep
the distance between the fan coil and heating or cooling source to a
minimum to reduce temperature loss from excess piping and keep
friction loss at a minimum. Ensure all piping between the heating or
cooling source and fan coil is properly insulated to minimize heat
loss.
The fan coil may be located some distance from the heating or
cooling source provided the circulator meets ow requirements.
The greater the distance from the source to the fan coil the longer
the response will be to a call for heat or cooling.
This fan coil must be installed vertical on a level surface.
NOTE: In the State of California, the fan coil must be braced,
anchored, or strapped to avoid moving during an earthquake.
Contact local utilities for code requirements in your area. Visit
http://www.dsa.dgs.ca.gov or call 1-916-445-8100 and request
instructions.
However, applicable local codes shall govern installation. Consult
the local building jurisdiction for acceptable bracing procedures.
NOTE: If you do not provide the minimum clearances shown in
Figure 1, it might not be possible to service the fan coil without
removing it from the space.
Ensure the installation location can support the entire lled weight
of the fan coil. Failure to properly support the fan coil could result
in property damage, severe personal injury, or death.
This fan coil must not be located near ammable liquids such as
gasoline, butane, liqueed propane, adhesives, solvents, paint
thinners, etc., as the controls of this fan coil could ignite these
vapors and cause an explosion resulting in property damage,
severe personal injury, or death.
This fan coil must be installed upright in the vertical position as
described in this manual. DO NOT attempt to install this fan coil
in any other orientation. Doing so will result in improper fan
coil operation and property damage, and could result in serious
personal injury or death.
B. Locating the Fan Coil
This fan coil is certied for indoor use only. DO NOT INSTALL
OUTDOORS. Outdoor installations ARE NOT covered by warranty.
Choose a location for the fan coil as centralized to the piping system
as possible. Also, locate the fan coil and piping where it will not be
exposed to freezing temperatures. All piping should be insulated.
Additionally, place the fan coil so that the drain, controls, and inlets/
outlets are easily accessible.
Part 2 - Prepare the Fan Coil
Remove all sides of the shipping crate to allow the fan coil to be moved
into its installation location.
UNCRATING THE FAN COIL - Any claims for damage or shortage
in shipment must be led immediately against the transportation
company by the consignee.
A. Included with the Fan Coil
The following items are included with the fan coil. Ensure all parts
ordered with the fan coil are received in good condition before
proceeding with installation.
Figure 1 - Included Parts - NOTE: Not all components are required for
the installation. For example, if the fan coil is wall mounted, the feet are
decorative and optional.
Regularly check that the installation location has not been
damaged by the weight of the fan coil and that the fan coil has not
begun to tip or lean and become unlevel. Failure to do so could
result in property damage, severe personal injury, or death.
Thermostat Wire Harness

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Figure 2 - Recommended Service Clearances
C. Water Chemistry Requirements
Chemical imbalance of the water supply may aect eciency
and cause severe damage to the fan coil and associated
equipment. The manufacturer recommends having water quality
professionally analyzed to determine whether it is necessary to
install a water softener. It is important that the water chemistry be
checked before installing the fan coil, as water quality will aect
the reliability of the system. Failure of a fan coil due to lime scale
build-up, low pH, or other chemical imbalance IS NOT covered by
the warranty.
• Sodium less than 20 mGL
• Water pH between 6.0 and 8.0
• Maintain water pH between 6.0 and 8.0. Check with
litmus paper or have it chemically analyzed by water
treatment company.
• If the pH diers from above, consult local water treatment
for treatment needed.
• Hardness less than 7 grains
• Consult local water treatment companies for unusually
hard water areas (above 7 grains hardness).
• Chlorine concentration less than 100 ppm
• Using chlorinated fresh water should be acceptable as
levels are typically less than 5 ppm.
• Do not ll fan coil or operate with water containing
chlorine in excess of 100 ppm.
*NOTE: It is recommended to clean the heat exchanger at least once
a year to prevent lime scale buildup. To clean the heat exchanger,
follow the maintenance procedure in this manual.
Hardness: Less than 7 grains
Chloride levels: Less than 100 ppm
pH levels: 6 - 8
TDS: Less than 2000 ppm
Sodium: Less than 20 mGL
D. Information and Recommendations
The fan coil is equipped with:
• An integrated thermostat control.
• A “TT” or “remote on/o” which can be used to call for heating
or cooling.
• A water control bypass valve for use in a continuously circulating
(or forced) water system. The fan coil can be used with or
without the bypass valve depending on the installation. If the
fan coil is used in a single unit installation, it is recommended
to remove the bypass valve.
In addition:
• The manufacturer primarily recommends the fan coil for use
in heating applications paired with an HTP heating appliance.
• This fan coil is capable of heating or cooling when installed
with other equipment not included with the fan coil (e.g. boiler
for heating, a chiller for cooling, or a reversible heat pump for
heating and cooling).
• This fan coil is not capable of switching a heat pump between
heating and cooling.
Consult with an experienced, certied HVAC professional to discuss
the many options available for integrating this product into your HVAC
system.

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Part 3 - Technical Specications
Model VFC-9P** VFC-14P** VFC-20P** VFC-25P** VFC-32P**
Heating Capacity (1) W 2550 3950 5750 7200 9400
BTU/hr 8700 13500 19600 24600 32000
Water Flow Rate (1) Gallons / Min 0.97 1.50 2.16 2.73 3.56
Pressure Drop (1) psig 1.54 1.77 3.80 3.99 4.09
Heating Capacity (2) W 1350 2500 3350 4300 5200
BTU/hr 4600 8500 11400 14600 17800
Water Flow Rate (2) Gallons / Min 1.01 1.89 2.55 3.26 3.92
Pressure Drop (2) psig 1.57 1.90 3.99 4.05 4.13
Cooling Capacity (3) W 1000 1900 2500 3500 4350
BTU/hr 3400 6500 8500 12000 14800
Water Flow Rate (3) Gallons / Min 0.75 1.45 1.89 2.64 3.30
Pressure Drop (3) psig 1.61 1.93 4.02 4.10 4.44
Air Volume CFM 94 188 270 340 381
Noise (4) dB (A) 30 32 37 39 41
Power Supply / 110 - 220V ~ /60 Hz
Power Input W 12 16 20 24 30
Water In / Out NPT 3/4”
Drain inch 0.63
Shipping Weight (est.) lb 38 47 53 62 69
Table 1 - Fan Coil Technical Specications (5) - ** ”WV” Denotes White Models with Valve; “B” Denotes Black Models without Valve
Test Conditions
(1) Heating test conditions based on input water temperature of 158oF, dierence in temperature of 50oF, and entering air temperature of
68oF DB.
(2) Heating test conditions based on input water temperature of 122oF, dierence in temperature of 41oF, and entering air temperature of
68oF DB.
(3) Cooling test conditions based on input water temperature of 44.6oF, dierence in temperature of 41oF, and entering air temperature of
66.2 / 80.6oF DB.
(4) Noise level is measured in the standard anechoic chamber <17dB(A).
(5) Above data is subject to change without notication.
Working Conditions
Heating: Ambient temperature of 41 - 84.2oF, Inlet Water temperature of 95 - 158oF
Cooling: Ambient temperature of 48.2 - 95oF, Inlet Water temperature of 41 - 68oF
A. Specications

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Figure 3 - Overall Product Dimensions
Model VFC-9P** VFC-14P** VFC-20P** VFC-25P** VFC-32P**
Dimension A (Inches) 27.56 35.43 43.31 51.18 59.06
Table 2 - Fan Coil Dimensions - ** ”WV”Denotes White Models with Valve; “B” Denotes Black Models without Valve
B. Dimensions
C. Description of Operation
The Ultra Thin Hydronic Fan Coil uses water to provide heated air in
the winter and cooled, dehumidied air in the summer. Incoming
air is drawn up through the fan coil and either heated or cooled
(depending on installation) over the water pipes before being
directed out of the top.
Compared with traditional fan coils, the Ultra Thin hydronic Fan Coil is
thinner, quieter, and more aesthetically pleasing, and can be installed
in various ways, such as oor installation, wall installation, ceiling
installation and concealed installation, thus reducing installation
costs.
Figure 4 - Description of Operation

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Part 4 - Installation
A. Precautions
Carefully follow these instructions to ensure correct fan coil installation
and proper operation. Failure to follow these instructions can result in
appliance malfunction and WILL VOID the warranty.
It is important that the electrical installation be made according to the
National Electrical Code and local rules and regulations while following
the data indicated in the technical specications in this manual. Ensure
the fan coil is properly grounded.
The fan coil must be installed in a position that allows for routine
maintenance, such as lter cleaning.
B. Positioning the Fan Coil
Avoid installing the unit in proximity to:
• Positions subject to exposure to direct sunlight;
• Heat sources;
• Damp areas or places with probable contact with water;
• Places with oil fumes;
• Places subject to high frequencies.
Ensure that:
• The wall on which the fan coil is installed is strong enough to
support the weight;
• The wall does not have pipes or electrical wires passing
through it;
• The wall is at and level;
• There are no obstacles which could interfere with inlet and
outlet air ow;
• The wall is preferably on the outer perimeter to allow discharge
of condensate outdoors.
C. Mounting
1. Dismount the upper grill by removing the xing screws. See Figure
5, ref A.
2. Lift the cover (Figure 5, B) that protects the screws (Figure 5, C) and
remove the screws. Move the side panel slightly and lift it out (Figure
5, D).
Figure 5 - Removing the Side Panel
3. Use the included paper template to trace the mounting position on
the wall. See Figure 6.
4. Place the mounting brackets on the wall over the traced holes and
check them with a level. See Figure 7.
5. If level, use a suitable drill to make the mounting holes and insert the
toggle bolts (two [2] bolts each bracket). See Figure 8, A.
6. Check the brackets again with a level. See Figure 7. If level, tighten
the two brackets. See Figure 8, B.
Figure 6 - Mounting Template
Figure 7 - Leveling the Brackets
Figure 8 - Mounting the Bracket
7. Mount the optional feet before installing the unit on the oor.
a. First, lay the unit down.
b. Next, remove the screws and two (2) feet from the accessories
bag.
c. Position the feet so that the screw holes A / B / C / D match up
with the holes on the unit. See Figures 9 and 10.
d. Use four (4) screws on each foot to properly install the feet to
the fan coil. See Figure 10.
Figure 9 - Mounting the Optional Feet

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8. Mount the fan coil onto the mounting brackets. Ensure that the
fan coil is stable and level. See Figure 11.
Figure 10 - Mounting Feet Locations
Figure 11 - Mounting the Fan Coil to the Bracket
D. Water Piping
Refer to Figures 12 through 17 for water piping applications.
• The water lines should be kept as short as possible.
• The piping system should be clean, with no sediment,
corrosion, or jams in the pipeline. Sediment, corrosion, or
jams could lead to water leakage.
• The water lines should be connected to the water tank and
the height of the water should be 19.69”higher.
• Y type lter should be installed in the water inlet of the unit.
• Air release valve should be installed above the water lines
to prevent air retention.
• Piping system should be pressure tested seperately and
not with the fan coil.
Failure to follow these instructions could result in property
damage and WILL VOID product warranty.
Figure 12 - Water Inlet and Outlet without Valves
Figure 13 - Water Inlet and Outlet with Valves

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Figure 14 - Flex Pipe Installation Downward to Inlet and Outlet without
Valves - Type 1 - Optional
Figure 15 - Flex Pipe Installation Backward to Inlet and Outlet without
Valves - Type 2 - Optional
Figure 16 - Flex Pipe Installation Downward to Inlet and Outlet with
Valves - Type 1 - Optional
Figure 17 - Flex Pipe Installation Backward to Inlet and Outlet with
Valves - Type 2 - Optional
E. Condensate Piping
When installing the condensate discharge device in vertically mounted
fan coils, connect the condensate collection tray discharge union
(Figure 18, C) to a pipe (Figure 18, B), and pipe discharge to a drain. The
discharge pipe must be adequately sized (minimum inside diameter
of 0.63 inches).
Figure 18 - Condensate Detail
• When discharging directly into open drains it is advisable
to make a siphon to prevent odors from the pipe entering
the room. The curve of the siphon must be lower than the
condensate collection orice.
• If the condensate is to be discharged into a container, the
pipe must be open to the atmosphere and the terminal must
not be submerged in water to avoid vacuum locks that would
interfere with normal outow.
Failure to follow these instructions could result in property damage
and WILL VOID product warranty.

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F. Purging
Begin lling the system by opening the inlet and outlet valves. Use a
screwdriver to open the purge screw. See Figure 19, A. When water
starts coming out, close the purge screw. Continue lling the system
until it reaches the nominal pressure value. Check the seals of the
gaskets and ensure there are no leaks.
It is advisable to repeat this procedure after the appliance has been
running for a few hours and periodically check the pressure of the
system.
NOTE: If the system is powered and a thermo-valve is installed, use a
special cap to press the valve stopper and open the valve.
Figure 19 - Air Purge Detail
Part 5 - Operation
A. Control Description
Figure 20 - Display and Control Detail
Power Button
Pressing this button turns the fan coil on and o.
Mode Button
Cooling Mode: Green Cooling Indicator Light turns on
Heating Mode: Red Heating Indicator Light turns on
Automatic Mode: Either the Cooling or Heating Indicator Light will turn on depending on Fan Coil function
Ventilating Mode: Cooling and Heating Indicator Lights remain o. The High, Mid, or Low fan speed indicator will be on
Dehumidifying Mode: The Cooling Indicator Light ashes on for two seconds and o for one second
NOTE: Mode Changes can only be completed on the main interface.
Fan Speed Button
High Fan Speed: The Blue High Fan Speed Indicator Light turns on
Medium Fan Speed: The Yellow Medium Fan Speed Indicator Light turns on
Low Fan Speed: The Orange Low Fan Speed Indicator Light turns on
Automatic: The High, Medium, or Low Fan Speed Indicator Lights will turn on depending on Fan Coil function
NOTE: Fan Speed Changes can only be completed on the main interface. Automatic Fan Speed cannot be selected while in
Ventilating Mode. In Dehumidifying Mode, the Fan Speed will be xed at low speed.
Up Arrow
Check the temperature setting by pressing this button once. Increase the temperature setting by pressing this button again.
Down Arrow
Check the temperature setting by pressing this button once. Decrease the temperature setting by pressing this button
again.
Table 3 - Display and Control Descriptions

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B. Setting the Temperature
When at the main heating, cooling, or automatic mode interface, press
or to check the setting temperature. Press or again
to increase or decrease the setting temperature. Press to change
mode, to change fan speed, or to shut down the fan coil and
save settings.
NOTE: The control will save any changed setting and return back to the
main interface if there is no operation on buttons for ve (5) seconds.
NOTE: or are invalid when the fan coil is in Ventilating or
Dehumidifying Mode.

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C. Remote Control (Optional) Description
Figure 21 - Remote Control Detail
Power Button
Pressing this button turns the fan coil on and o.
Mode Button
Press this button to choose from the Automatic, Cooling, Dehumidifying, Ventilating, and Heating Modes.
Fan Speed Button
Press this key to choose from High, Medium, and Low Fan Speeds.
Up Arrow
Increase the setting by pressing this button.
Down Arrow
Decrease the setting by pressing this button.
Table 4 - Display and Control Descriptions
NOTE: Take out the batteries from the remote if it is not to be used
for a long time. If the remote is not working properly, take out the
batteries for thirty-ve (35) minutes to allow it to reset. Replace the
batteries. The remote should work normally.
D. Using the Remote Control
1. F. Cool and F. Heat Function
Press the“F. Cool”or“F. Heat”buttons to automatically set the fan coil
to either Cooling or Heating Mode at high fan speed.
2. Time Setting
Press and hold the button until the time value ashes. Adjust the
current time value by pressing to increase or to decrease.
To save the time setting, press the button again.
NOTE: A 12 hour clock displays the current time value. A 24 hour clock
is not available.
3. Timing Start-Up or Timing Shut-Down
NOTE: Timing Start-Up is only available when the fan coil IS NOT
operating. DO NOT shut power supply o to the fan coil when setting
Timing Start-Up. Timing Shut-Down is only available when the fan coil
IS operating.
Press the Timing Start-Up button while the fan coil is not
operating to setTiming Start-Up. Use the or buttons to set the
number of hours the fan coil will operate. The unit will automatically
begin to operate one hour after setting Timing Start-Up.
NOTE: The range of Timing Start-Up is from 1 to 11 hours. If the setting
is over 11 hours the Timing Start-Up setting will be cancelled.

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Press the Timing Shut-Down button while the fan coil is
operating to set Timing Shut-Down. Use the or buttons
to set the number of hours the fan coil will operate. The unit will
automatically stop operating one hour after setting Timing Shut-
Down.
NOTE: The range of Timing Shut-Down is from 1 to 11 hours. If the
setting is over 11 hours theTiming Shut-Down setting will be cancelled.
4. Sleep Function
NOTE: The Sleep Function can only be set while the fan coil is in
Heating or Cooling Mode.
a. To begin or cancel the Sleep Function, press the button.
b. When the Sleep Function is activated, the icon will be shown
on the top right corner of the remote control’s LCD screen. “TIME
OFF” and “7” will be shown on the lower right corner of the LCD
screen. This means that the fan coil will automatically shut down
seven (7) hours after setting the Sleep Function. To change the
amount of hours or cancel the time setting altogether, press the
key.
c. One (1) hour after setting the Sleep Function, the fan speed will
automatically reduce to low. However, while Sleep Function is set,
fan speed can be changed by pressing .
d. Two (2) hours after setting the Sleep Function in Cooling Mode
the temperature setting will increase 1oC or about 2oF per hour.
e. Three (3) hours after setting the Sleep Function in Heating Mode
the temperature setting will decrease 1oC or about 2oF per hour.
5. Change Temperature Measurement
Press to switch Temperature Measurement from Celsius to
Fahrenheit.
6. Illuminate the LED Screen
Press the key to light or turn o the LED Screen on the fan coil.
E. Default Settings
Mode Default Setting
Cooling Temperature 75.2oF
Heating Temperature 82.4oF
Automatic Setting Temperature 71.6oF
Table 5 - Default Settings - NOTE: Temperatures are Adjustable
Part 6 - Maintenance and Troubleshooting
A. Cleaning
DO NOT carry out any maintenance or cleaning on the fan coil
before turning o the power supply. Failure to adhere to these
guidelines can result in substantial property damage, electric
shock, severe personal injury, or death.
To promote fan coil reliability and safety it is recommended to main-
tain and clean it a minimum of every six months. Some installation
conditions may require more frequent cleaning.
To clean the lter:
1. Open the grill at the fan coil. Using a at head screwdriver to
gently pry the top of the grill may aid in this process. See Figure
22.
2. Open the grill. See Figure 23.
Figure 22 - Opening the Grill Figure 23 - Opening the Grill
3. Lift out the grill (Figure 24). Remove it and set it aside (Figure
25).
Figure 24 - Lifting Out the Grill Figure 25 - Removing the Grill
4. Remove the lter (Figure 26).
5. Wash the lter with water (Figure 27).
F. Parameter List
Number Detail Range Default
01 Target Temp. High Limit 16 - 205oF 86oF
02 Target Temp. Low Limit 16 - 205oF 46oF
03 Target Cooling Temp.
Para 02 -
Para 01
78oF
04 Target Heating Temp. 68oF
05 Auto Mode Target Cooling Temp. 78oF
06 Auto Mode Target Heating Temp. 68oF
07
In Heating Mode, if the coil temp. is
lower than this set temperature the
fan will shut o.
41 - 104oF 77oF
08
In Cooling Mode, if the coil temp.
is higher than 68oF the fan will
shut o. 0 (O or
No) - 1 (On
or Yes)
1
09 Turn on Ultra Low Fan Speed 0
10 Is a Water Valve Installed? 1
11 Is the system used for radiant
oor heating? 0
12 Fahrenheit or Celsius 0 (C) - 1 (F) 1
13 Is the fan coil used as the main
temperature controller?
0 (No) - 1
(Yes) 0
Table 6 - Parameter Settings - NOTE: Temperatures are Adjustable
Number Detail Range Default
14 Address 1 - 99 15
15 Lock the Control?
0 (No) - 1
(Yes)
0
16 Use the Remote Control while the
Main Control is Locked? 1
17 Require a password to unlock the
control? 0
18 Password 1 0 - 99 50
19 Password 2
20 In standby mode, the fan turns on
and o intermittently.
0 (No) - 1
(Yes) 1

lp-586 Rev. 000 Rel. 001 Date 2.12.18
15
Figure 26 - Removing the Filter Figure 27 - Washing the Filter
6. Dry and reinstall the lter in the fan coil. Then clean and dry the
grill and reinstall it. See Figure 28.
7. Use a soft and damp rag to clean the outer body of the fan coil.
See Figure 29.
NOTE: To protect the paint coat DO NOT use rough sponges or
corrosive detergents to clean the fan coil.
Figure 28 - Reinstalling the Filter Figure 29 - Cleaning the Unit
B. Common Faults and Solutions
The following table describes common fault codes and their usual
solutions.
Fault Code Malfunction Cause Solutions
P4
Indoor
ambient
temperature
sensor
Ambient
temperature
sensor is open
or shorted
Check or
replace the
ambient
temperature
sensor
P5
Coil
temperature
sensor
Coil
temperature
sensor is open
or shorted
Check or
replace the coil
temperature
sensor
P6
Motor
feedback
signal
Feedback wire
is not properly
wired or fan
motor has failed
Check the
feedback wire
or replace the
fan motor
Table 7 - Fault Code Table
Part 7 - Wiring
DO NOT wire the fan coil before turning o the power supply.
Failure to ensure the power is o before wiring the fan coil can
result in substantial property damage, electric shock, severe
personal injury, or death.
Connecting the Thermostat Wire Harness
1. After the fan coil is powered o, lift the plastic cover on the control
and use a small at head screwdriver or needlenose pliers to remove
the plug covering the screw. Then use a Phillips head screwdriver to
remove the screw securing the side panel to the fan coil. See Figure 30.
Figure 30 - Removing / Reinstalling the Side Panel Screw
Figure 31 - Removing / Reinstalling the Internal Wiring Cover
Figure 32 - Connected Thermostat Wire Harness
2. Lift and remove the side panel. Place it gently in front of the fan coil.
This process can be done by hand.
3. Use a Phillips head screwdriver to remove the four (4) screws
connecting the internal wiring cover. See Figure 31. Remove the
internal wiring box cover.
4. Connect the Thermostat Wire Harness to the control board. See
Figure 32.
5. Connect the Boiler Thermostat or Heat Pump On/O to the Wire
Harness using the provided push-on connectors.
6. Run the connected wire down toward the bottom of the internal
wiring box. Reinstall the internal wiring box cover with the screws
removed in Step 3.
7. Run the wire through the knockout provided on the bottom of the
side panel. Reinstall the side panel by hand as described in step 2.
Then reinstall the screw and plug removed in step 1.
8. Restore power to the fan coil. Ensure the unit operates properly.

lp-586 Rev. 000 Rel. 001 Date 2.12.18
16
Figure 33 - Internal Wiring
No. Signal Denition
1 CN4 Fan Output
2 PROG1 Programming Port
3 CN7 To Control
4FAN Fan Feedback
5 TEMP To Ambient and Coil Temperature
6 N OUT To Valve
7 L Live Wire
8 N Neutral Wire
9 NET1 Communication or On-Line Port
10 OUT2 TT for Boiler (On/O for Heat Pump)
11 TC Transformer
Table 8 - Wiring Descriptions

lp-586 Rev. 000 Rel. 001 Date 2.12.18
17
Figure 34 - Replacement Parts

lp-586 Rev. 000 Rel. 001 Date 2.12.18
18
Ultra Thin Hydronic Fan Coil
Limited Five (5) Year Warranty
For Residential and Commercial Use
HTP warrants each ultra thin hydronic fan coil and its components
to be free from defects in materials and workmanship according
to the following terms, conditions, and time periods. UNLESS
OTHERWISE NOTED THESE WARRANTIES COMMENCE ON THE DATE
OF INSTALLATION. This limited warranty is only available to the
original consumer purchaser (hereinafter “Owner”) of the fan coil,
and is non-transferable.
COVERAGE
A. During the rst year after the original date of installation in the
dwelling, HTP warrants that it will repair or replace, at its option, any
defective or malfunctioning component of the hydronic fan coil that
is found to have failed due to manufacturer’s defect. Replacement
components will be warranted for ninety (90) days.
B. Should a defect or malfunction result in a leakage of water
from the fan coil within the above-stated warranty periods due to
defective material or workmanship, malfunction or failure to comply
with the above warranty, with such defect or malfunctioning having
been veried by an authorized HTP representative, HTP will replace
the defective or malfunctioning fan coil with a replacement of the
nearest comparable model available at the time of replacement. The
replacement fan coil will be warranted for the unexpired portion of
the applicable warranty period of the original fan coil.
C. In the event of a leakage of water of a replacement fan coil due
to defective material or workmanship, malfunction, or failure to
comply with the above warranty, HTP reserves the right to refund
to the Owner the published wholesale price available at the date of
manufacture of the original fan coil.
D. If, at the time of a request for service the Owner cannot
provide a copy of the original sales receipt or the warranty card
registration, the warranty period for the fan coil shall then be
deemed to have commenced thirty (30) days after the date of
manufacture of the fan coil and NOT the date of installation of
the fan coil.
E. If government regulations, industry certication, or similar
standards require the replacement fan coil or component(s) to
have features not found in the defective fan coil or component(s),
the Owner will be charged the difference in price represented by
those required features. If the Owner pays the price difference for
those required features and/or to upgrade the size and/or other
features available on a new replacement fan coil or component(s),
the Owner will also receive a complete new limited warranty for
that replacement fan coil or component(s).
F. This warranty extends only to fan coils utilized in applications
that have been properly installed by qualied professionals
based upon the manufacturer’s installation instructions.
G. It is expressly agreed between HTP and the Owner that repair,
replacement, or refund are the exclusive remedies of the Owner.
H. HTP will not accept claims from the Owner for labor costs incurred
by any person as a result of the repair, replacement, removal, or
reinstallation of a fan coil or any component thereof.
OWNER RESPONSIBILITIES
The Owner or Installer must:
1. Maintain the fan coil in accordance with the maintenance
procedure listed in the manufacturer’s provided instructions.
Preventive maintenance can help avoid any unnecessary breakdown
of the fan coil.
2. Maintain all related system components in good operating
condition.
3. Keep the fan coil free of damaging scale deposits.
4. Make provisions so if the fan coil or any component or
connection thereto should leak, the resulting ow of water will
not cause damage to the area in which it is installed.
WARRANTY EXCLUSIONS
This limited warranty will not cover:
1. Any fan coil purchased from an unauthorized dealer.
2. Any fan coil not installed by a qualied heating installer/service
technician, or installations that do not conform to any applicable
national or local building codes.
3. Service trips to teach the Owner how to install, use, maintain, or
to bring the fan coil installation into compliance with local building
codes and regulations.
4. Failure to locate the fan coil in an area where leakage of the fan
coil or water line connections will not result in damage to the area
adjacent to the fan coil or lower oors of the structure.
5. Any failed components of the system not manufactured by HTP as
part of the fan coil.
6. Fan coils repaired or altered without the prior written approval of
HTP.
7. Damages, malfunctions, or failures resulting from improper
installation, or failure to install the fan coil in accordance with
applicable building codes/ordinances or good plumbing and
electrical trade practices; or failure to operate and maintain the fan
coil in accordance with the manufacturer’s provided instructions.
8. Damages, malfunctions, or failures resulting from failure to operate
the fan coil at pressures not exceeding the working pressure shown
on the rating label.
9. Failure or performance problems caused by improper sizing of the
fan coil or piping, electric service voltage, wiring or fusing.
10. Damages, malfunctions, or failures caused by operating the
fan coil with modied, altered, or unapproved components, or any
component / attachment not supplied by HTP.
11. Damages, malfunctions, or failures caused by abuse, accident,
re, ood, freeze, lightning, acts of God and the like.
12. Failure of the fan coil due to the accumulation of solid materials
or lime deposits.
13. Any damage or failure resulting from improper water chemistry.
WATER CHEMISTRY REQUIREMENTS – Sodium less than 20mGL.
Water pH between 6.0 and 8.0. Hardness less than 7 grains. Chlorine
concentration less than 100 ppm.
14. Fan coils replaced for cosmetic reasons due to damages to the
exterior (scratches, dents, etc.)
15. Components of the fan coil that are not defective, but must be
replaced during the warranty period as a result of reasonable wear
and tear.
16. Components of the fan coil that are subject to warranties, if any,
given by their manufacturers. HTP does not adopt these warranties.
17. Fan coils installed outside the fty states (and the District of
Columbia) of the United States of America and Canada.
18. Fan coils moved from the original installation location.
19. Fan coils that have had their rating labels removed.
20. Any labor charges incurred by any person in connection with
the examination or replacement of a fan coil or parts claimed by the
Owner to be defective.
PROCEDURES FOR WARRANTY SERVICE REQUESTS
Any claim for warranty assistance must be made immediately upon
nding the issue. First, please consult the HTP Warranty Wizard
(http://www.htproducts.com/Warranty-Wizard.html) to check
warranty eligibility. You may also contact HTP Technical Support
at 1-800-323-9651 for questions or assistance. Warranty coverage
requires review and approval of the issue with HTP Technical Support
or through the Warranty Wizard prior to a full unit replacement. Any
claim for warranty reimbursement will be rejected if prior approval
from HTP is not obtained in advance of a full unit replacement. Final
determination will be made as part of the warranty claim process.
When submitting a warranty claim the following items are
required:

lp-586 Rev. 000 Rel. 001 Date 2.12.18
19
1. Proof of purchase or installation of the product – Typically a
copy of the invoice from the installing contractor, the receipt of the
purchase of the product, or an original certicate of occupancy for
a new home.
2. Clear pictures (or video) of the following:
a. Serial number tag (sticker)
b. The product
c. The product issue / failure whenever possible
d. A picture of the piping near the product
e. For gas red products, a picture of the venting, including how
it exits the building
All claims will be reviewed by HTP within three (3) business days. If
additional information is required and requested by the HTP Claims
Department you will have thirty (30) days to provide it. When all
requested information is provided HTP will respond within three (3)
business days. The claim will be automatically closed if requested
information is not provided within thirty (30) days. Claims will not be
reopened without HTP Warranty Supervisor approval.
During the claims process a product that must be replaced will be
given a designation of either a) eld scrap, or b) return to HTP. If the
product must be returned to HTP, the returned product must arrive
at HTP within thirty (30) days of the date of our request to return the
product. After receipt of the returned product HTP may require as
many as thirty (30) additional days for product testing. NOTE: Any
components or heaters returned to HTP for warranty analysis
will become the property of HTP and will not be returned, even
if credit is denied.
If you have questions about the coverage of this warranty, please
contact HTP at the following address or phone number: HTP, 272
Duchaine Blvd., New Bedford, MA, 02745, Attention: Warranty Service
Department, 1(800) 323-9651.
SERVICE, LABOR AND SHIPPING COSTS
This limited warranty does not extend to any shipping charges,
delivery expenses, or administrative fees incurred by the Owner in
repairing or replacing the fan coil or component(s). This warranty
does not extend to any labor costs incurred by any person as a
result of the repair, replacement, removal, or reinstallation of a fan
coil or any component thereof. All such expenses are the Owner’s
responsibility.
LIMITATIONS OF THIS HTP WARRANTY AND REMEDIES
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND
ACCEPTED TO THE FURTHEST EXTENT UNDER APPLICABLE LAW IN
LIEU OF ANY AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
AND ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN
CONTRACT OR TORT, WHETHER OR NOT ARISING FROM HTP’S
NEGLIGENCE, ACTUAL OR IMPUTED. THE REMEDIES OF THE OWNER
SHALL BE LIMITED TO THOSE PROVIDED HEREIN TO THE EXCLUSION
OF ANY OTHER REMEDIES INCLUDING WITHOUT LIMITATION,
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SAID INCIDENTAL
AND CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO,
PROPERTY DAMAGE, LOST PROFIT OR DAMAGES ALLEGED TO HAVE
BEEN CAUSED BY ANY FAILURE OF HTP TO MEET ANY OBLIGATION
UNDER THIS AGREEMENT INCLUDING THE OBLIGATION TO REPAIR
AND REPLACE SET FORTH ABOVE. NO AGREEMENT VARYING OR
EXTENDING THE FOREGOING WARRANTIES, REMEDIES OR THIS
LIMITATION WILL BE BINDING UPON HTP. UNLESS IN WRITING
AND SIGNED BY A DULY AUTHORIZED OFFICER OF HTP. THE
WARRANTIES STATED HEREIN ARE NOT TRANSFERABLE AND
SHALL BE FOR THE BENEFIT OF THE OWNER ONLY.
NO OTHER EXPRESS WARRANTIES
This warranty gives the Owner specic legal rights. The Owner may
also have other rights that vary from state to state. Some states do
not allow the exclusion or limitation of incidental or consequential
damages so this limitation or exclusion may not apply to the Owner.
These are the only written warranties applicable to the fan coil
manufactured and sold by HTP. HTP neither assumes nor authorizes
anyone to assume for it any other obligation or liability in connection
with said fan coils.
HTP reserves the right to change specications or discontinue
models without notice.

lp-586 Rev. 000 Rel. 001 Date 2.12.18
20
Customer Installation Record Form
The following form should be completed by the installer for you to keep as a record of the installation in case of a warranty claim. After
reading the important notes at the bottom of the page, please also sign this document.
Customer’s Name
Date of Installation
Installation Address
Product Name / Serial Number(s)
Comments
Installer’s Code / Name
Installers Phone Number
Signed by Installer
Signed by Customer
IMPORTANT
Customer: Please only sign after the installer has fully reviewed the installation, safety, proper operation, and maintenance of the system. If
the system has any problems please call the installer. If you are unable to make contact, please call your sales representative.
Distributor / Dealer: Please insert contact details.
Correct Disposal of this Product
This marking indicates that this product
should not be disposed with other household
wastes. Recycle it responsibly to promote the
sustainable reuse of material resources and
prevent possible harm to the environment
or human health from uncontrolled waste
disposal.