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.