Aqua-Air Tempwise 2001 User manual

Aqua-Air Tempwise 2001
Chillwater Digital Thermostat
Operating Manual
Aqua-Air Manufacturing
division of the James D. Nall Co., Inc.
1050 East 9th Street
Hialeah, FL 33010 U.S.A.
Phone (305) 884-8363 Fax (305) 883-8549
Email: [email protected]

Tempwise 2001 Chillwater Digital Thermostat
Aqua-Air Manufacturing
1050 East 9th Street
Hialeah, Florida 33010 U.S.A.
Contents
Introduction ......................................................... 1
BasicOperation ..................................................... 2
OperatorControlsandDisplayPanel .................................... 4
Dual Button Functions ................................................ 7
ModesofOperation .................................................. 7
FanModes.......................................................... 9
ProgramMode....................................................... 9
Programming ...................................................... 12
DefaultSettingsTable ............................................... 12
SpecialHardwareInstructions ........................................ 18
Specifications ...................................................... 19
Trouble Shooting Guide .............................................. 21
Copyright © 1997 Micro Air Corporation, All Rights Reserved
No part of this publication may be reproduced, translated, stored in a retrieval system, or transmitted on any form or
by means electronic, mechanical, photocopying, recording or otherwise without prior written consent by Micro Air
Corporation.
Every precaution has been taken in the preparation of this manual to insure its accuracy. However, Micro Air
Corporation assumes no responsibility for errors and omissions. Neither is any liability assumed for damages
resulting from the use of this product and information contained herein.

Tempwise 2001 Chillwater Digital Thermostat Manual
Page 1
INTRODUCTION
The Tempwise 2001 Control is designed for use with Aqua-Air Chilled Water Air
Conditioning Systems. The Tempwise 2001 has a universal power supply that
operates on 115V or 230V, 50 or 60 Hz AC power. The Tempwise 2001 includes the
following standard and optional features:
Standard Features
Paintable Face Plate Cover with recess for matching wall covering insert
User friendly 6 button display panel
Five volt logic and micro controller located in the display
3-digit 7-segment display indicates /F or /C
Automatic fan speed reduction as set point is approached
Six (6) manual fan speeds
18 programmable parameters for custom installations
Water In Sensor allowing individual cabin heating
Moisture Mode for controlling relative humidity
Universal AC power supply
Nonvolatile memory retains settings without batteries
Programmable display brightness control for night use
Optional Features
The following optional items can be added by plugging the device into the appropriate
jack and making the necessary programming changes:
Custom Polished Brass Display Panels
Electric Heating element Option
This manual is intended to provide information necessary to insure proper installation
and operation of the Tempwise 2001. Poor installation and/or MISUNDERSTOOD
operating parameters will result in unsatisfactory performance and premature failure of
the Tempwise 2001.

Tempwise 2001 Chillwater Digital Thermostat Manual
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Read This Manual Completely Before Proceeding!
If you require assistance prior to or during the installation of the Tempwise 2001 call
Aqua-Air at (305) 884-8363 or Fax your questions to Aqua-Air at (305) 883-8549. The
Tempwise 2001 is covered under existing Aqua-Air Manufacturing Warranty Policy.
Incorrect installation, neglect and system abuse are not covered under Aqua-Air's
warranty policy.
NOTE: In order to continually improve the Tempwise 2001 Control, Aqua-Air
reserves the right to change this product’s basic operation, specifications and
design criteria without prior notice.
BASIC OPERATION
The Tempwise 2001 is a user friendly, easy to operate, programmable temperature
control.
• Press the ON/OFF button once to engage the system. The display indicates room
temperature when the system is on and the display is blank when the system is off.
• Press and release the Mode Button until the desired Mode LED is illuminated.
• Set the room temperature by pressing the up or down button. The set point can be
viewed by momentarily pressing and releasing the up or down button.
Fan speed operation is automatic. The fan speed decreases as set point temperature
is approached. The fan will operate at low speed when set point is satisfied. Manual
fan speeds can be selected by pressing the Fan Speed Button and selecting the desired
fan speed. The fan will operate at the speed selected and will not change speeds with
room temperature.
The fan can be programmed to cycle on and off with the Heating and Cooling demand.
Normally the automatic fan speed operation is reversed in the heating mode, however,
the fan speeds can be programmed to operate the same as in the cooling mode.

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NORMAL HEATING OR COOLING CYCLE
When heating or cooling is called for, the water valve switches to the appropriate mode.
Four (4) seconds later the automatic fan control adjusts the fan to the proper speed.
When the demand is satisfied, the water valve cycles off and the fan returns to low
speed. If cooling is required, the water valve will not open unless adequate cooling
water is available. The fan will remain in low speed until adequate cooling water is
available. If heating is required the valve will not open unless adequate heating water is
available. The fan remains in low speed until adequate heating water is available. The
water temperature can be viewed by simultaneously pressing the Up and Down Buttons
while in the On Mode. Heat will be supplied when no heating water is available if the
Optional Electric Heater (Electric heating element) has been installed and programmed.
While in the Heating or Cooling Mode, the controller will maintain a two degrees
Fahrenheit (2/F) temperature variation. A four degree swing is required to cause the
unit to shift to the opposite mode. Once in a new mode, Heating or Cooling, the
Tempwise 2001 will maintain a two degree differential.
MOISTURE MODE
While in the On mode, press the Mode Button until the Moisture Control LED is lit.
Every four (4) hours, the fan is started and air circulated for thirty (30) minutes. During
this time the air temperature is sampled and entered into memory. The cooling cycle is
started and continues until the temperature is lowered 2/F. The system is allowed a
maximum of one hour running time to reach the desired temperature. Four (4) hours
after the temperature is satisfied or the Cooling Mode times out, the cycle is repeated.
During the humidity cycle the water valve LED is lit while the system is cooling. The first
cycle starts 1 minute after selecting this mode.
MEMORY
The Tempwise 2001 has nonvolatile memory which requires no batteries or any form of
backup power. When power is lost the operating parameters are retained indefinitely.
When power is restored, the control resumes operating as last programmed. All
operating and programming parameters are entered into nonvolatile memory instantly
and are retained indefinitely.

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OPERATOR CONTROLS AND DISPLAY PANEL
Refer to Figure 1 for the buttons locations and display functions listed on the following
pages.
Tempwise 2001 Display Panel
Figure 1: Tempwise 2001 Control Buttons and Indicator Displays
1. POWER BUTTON - The power button is used to toggle between the On and Off
modes. Press the power button once to toggle the unit to the On mode. Press
the power button again to toggle to the Off mode.
2. FAN SPEED BUTTON - The fan speed button is used to switch between Auto
and Manual Fan Speeds. Pressing and releasing the Fan Speed Button once

Tempwise 2001 Chillwater Digital Thermostat Manual
Page 5
toggles the fan mode as indicated by the Fan LED indicator lamps. Press and
release the fan speed button until the desired Automatic (A) or Manual Fan Speed
(1 through 6) is selected.
3. UP BUTTON - Momentarily press the up button and the set point will appear in
the temperature display. Press and release the up button to increase the set point
one degree. The set point Is increased by one degree each time the up button is
pressed and released. The highest set point allowed is 85/F. The up button is
used with the down button to display the Water In temperature when the control is
on. The up button is also used to increase program values in the program mode.
4. DOWN BUTTON - Momentarily press and release the down button to display the
set point. Press and release the down button to decrease the set point. The set
point is decreased one degree each time the down button is pressed and
released. The lowest set point allowed is 55/F. The down button is used in
conjunction with the up button to display Water In temperature when the control is
on. The down button is also used to reduce program values in the program mode.
5. MODE BUTTON - The mode button is used to select one of the four operating
modes. Press and release the mode button and the Tempwise 2001 will advance
to the next mode. Continue to press and release the Mode button until the
desired operating mode is reached. The mode selected is indicated by the Mode
LED, i.e., Cool, Heat, Automatic or Moisture Mode.
6. TEMP SELECT BUTTON - Press and release the Temp Select button to view
inside air temperature, outside air temperature (optional) or the set point. The
appropriate LED, Inside, Outside or Set Point will be lit indicating which
temperature is being displayed. If no outside air sensor is installed three (3)
dashes will appear in the Three Digit Display.
7. THREE DIGIT SEVEN SEGMENT DISPLAY - The inside air temperature is
displayed in the window whenever the control is turned on. The three digit 7
segment display provides a readout of the return air temperature. The display
also indicates program information, fault codes and outside air temperature when
the optional outside air sensor is installed. The display momentarily indicates the
set point when the up or down button is pressed. When the control resumes
operation after a power interruption all the display LEDs will turn on for one
second. This is a normal operating condition and is referred to as "Power On
Reset".

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8. HEAT MODE LED - The heat mode LED will be lit when the Heat Mode has been
selected. The heat mode LED is also lit when the optional electric heat is installed
and the heat mode is selected. Electric heater status, on or off, is indicated by the
right side decimal point (18).
9. COOL MODE LED - The cool mode LED will be lit when the Cooling Mode has
been selected.
10. AUTO LED - The auto LED is lit when the automatic heating or cooling mode has
been selected. The control will automatically switch to heating or cooling when
this mode is selected.
11. MOISTURE CONTROL LED - The moisture mode LED is lit when the Moisture
Control has been selected. This mode is used to control humidity during periods
when the vessel is unoccupied.
12. MANUAL FAN LED - The manual fan LED will be lit when one of six manual fan
speeds has been selected.
13. AUTO FAN LED - The auto fan LED is illuminated when automatic fan speed
operation has been selected.
14. FAN SPEED BAR GRAPH - There are six (6) individual fan speed LED's in the
Fan Speed Bar Graph. Each LED represents one (1) fan speed. Low fan speed
(1) is indicated by illuminating the first LED. High fan speed is indicated by
illuminating all six (6) LED's. Any of the six (6) fan speeds available are displayed
by illuminating the appropriate LED's.
15. INSIDE LED - The inside LED is lit when the inside air temperature is being
displayed.
16. OUTSIDE LED - The outside LED is turned on when the outside temperature is
displayed (optional).
17. SET POINT LED - The set point LED is turned on when the set point is displayed.
18. VALVE LED - The water valve operating status (Open or Closed) is indicated by
turning on the right most decimal point in the 3 Digit Display.

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DUAL BUTTON FUNCTIONS
Up & Down Buttons - Simultaneously Press the Up and Down buttons, while in the On
Mode, to view the chillwater inlet temperature.
Simultaneously Press the UP & Down Buttons while in the program mode to set new
custom programming defaults.
MODES OF OPERATION
Off Mode
When the Tempwise 2001 is in the Off mode, all control outputs are turned off.
Program parameters and user settings are saved in nonvolatile memory. The program
mode can only be accessed from the Off mode.
On Mode
When the control is in the On mode, power will be supplied to the appropriate control
outputs and the display will indicate the current state of operation. The operating and
program parameters resume based on those stored the last time the unit was operating.
Cool Only Mode
When “Cool” LED is on, only the cooling systems are selected and operated as
required. When the temperature drops below the set point, the system will not
automatically switch to the heating mode. Cooling only is available for customers that
do not want automatic cooling and heating operation.
Heating Only Mode
When the “Heat” LED is on, only the heating systems are selected and operated as
required. Should the temperature rise above the set point, the system will not
automatically switch to the cooling mode. Heating only is supplied for customers that
require the system to not automatically switch from the heating to the cooling mode.

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Page 8
Automatic Mode
When the “Automatic” LED is on, both heating and cooling are supplied as required.
The heat and cool LEDs will be lit according to the mode required. When the system
requires the water valve to be turned on for heating or cooling the water valve LED will
turn on when the valve is on and will turn off when the valve is off.
Temperature in a given mode will be maintained within two degrees Fahrenheit (2/F) of
the setpoint temperature, however, a four degree difference is required to allow the
control to change modes. Once in a new mode, the temperature will remain within two
degrees Fahrenheit (2/F) of the set point.
Moisture Mode
While in the “On” mode, press the Mode Button until the Moisture Mode LED is
illuminated. Every four (4) hours, the fan is started and air circulated for thirty (30)
minutes. During this time the air temperature is sampled and entered into memory.
The cooling cycle is started and continues until the temperature is lowered 2/F. The
system is allowed maximum of one hour running time to reach the desired temperature.
Four (4) hours after the temperature is satisfied or the one hour timer runs out the cycle
is repeated. During the humidity cycle the water valve LED is lit while the water valve is
turned on and the system is cooling. The first cycle starts one minute after selecting
this mode.

Tempwise 2001 Chillwater Digital Thermostat Manual
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FAN MODES
Automatic Fan Speeds
Tempwise 2001 has six automatic fan speeds available. Speed
six is high, three is medium and one is low or the slowest speed.
Automatic fan mode allows the Tempwise 2001 to determine
the required fan speed based on room temperature. The closer
the room temperature is to the set point, the slower the fan will
run. This permits a balance between the most efficient
temperature control and slower, quieter fan speeds. Automatic
fan operation is the factory default, however, manual fan speed
control is available.
Manual Fan Speeds
Six (6) is the fastest and one (1) represents the slowest fan
speed. Manual fan mode allows the user to select and maintain
the desired fan speed manually. When a manual fan speed has
been selected, the fan speed bar graph will indicate the speed
selected by the number of LED's lit. Select speed 3, for Fan
Speeds example, and the first 3 LEDs in the fan bar graph will turn on. Manual Fan
Mode is sometimes preferred when room temperature is constantly changing due to
varying heat loads.
PROGRAM MODE
Program Mode Overview
The program mode is used to adjust the systems operating parameters to suit the
particular needs of individual users. The program mode is also used to tailor the air-
conditioning system for the most efficient operation within an installation. Installation
variables such as, ducting, sensor location and system layout affect the perceived
operation of the overall system. The program mode allows the system to operate as
efficiently as possible under all conditions. The Tempwise 2001 is shipped with factory
programmable default settings which are stored in permanent memory and can be
recalled at any time.

Tempwise 2001 Chillwater Digital Thermostat Manual
Page 10
Warning
Severe electrical disturbances can sometimes upset the
Tempwise 2001 operating sequences. Operator confusion
related to program parameters can also cause what may seem to
be operational problems. Whenever there is any doubt as to the
proper operation of the controller, Factory Default Parameters
should be re-initialized.
Entering Program Mode
The program mode can only be entered from the
off mode. From the off mode and in the following
order, press the Select, Up, Down and the
Select buttons. These buttons have to be
pressed and released in the order given. The
letter "P" appears in the display. The buttons
have to be pressed in the sequence described.
Remember "SUDS"... It's the key to enter and
unlock the program mode. The characters "P"
then "P1" followed by the parameter setting,
appear in the display. The Tempwise 2001
control is now in the program mode. Exit the program mode, to the off mode, by
pressing and releasing the power button.
NOTE: The control will exit the program mode and return to the “off” mode if no
programming is attempted for one (1) minute.
Restore Memorized Default Settings
IMPORTANT! The memorized default settings can be restored by entering the software
ID program mode and setting P-16 to rSt. Exit the program mode and the software
version number appears in the display. The memorized default settings are restored
and the Tempwise 2001 control returns to the off mode. The software version number
is always displayed when you exit the program mode.

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USING THE PROGRAM MODE
Increment from one program parameter to the next by pressing the Mode Button while in
the program mode. Press and release the Mode Button to advance to the desired
parameter. Use the up and down buttons to change the program parameter values. The
programmable parameters range from P-1 through P-18.
Up and Down Buttons
The up and down buttons are used to select the data or set the desired limits for the
parameter being programmed. This method is followed throughout the program mode,
however, special instructions are included for individual functions as required.
Exiting the Program Mode
There are two methods to exit the Program mode. Press the power button and the
Tempwise 2001 control will return to the Off mode. Not pressing any buttons or attempting
any program changes for sixty (60) seconds will allow the control to exit the Program mode
to the Off mode. Any programming changes that were made while in the Program mode
will be memorized and put into operation when the Program mode is exited and the control
is returned to the On mode.
Software Identification
The software version of the control is identified for one (1) second prior to the exit from the
program mode. The software identification number, i.e. "A10" will appear in the display for
one second, then the control will return to the off mode.
Should there be any reason to contact Aqua-Air Manufacturing about the system or
programming the Tempwise 2001 be sure to have the software identification number
available.

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PROGRAMMING
Programmable Parameters
There are eighteen (18) programmable parameter locations with their Factory Default
Settings listed in this section. The table below indicates what these parameters are, along
with the permitted values and the original Factory Default Settings.
Program
Number Description Default Range
P-1 High Fan Speed Limit (arbitrary units) 85 56 - 85
P-2 Low Fan Speed Limit (arbitrary units) 50 30 - 55
P-3 Unused - Reserved for future use N/A N/A
P-4 Temperature Sensor Calibration 0 Ambient ± 10/F
P-5 Unused - Reserved for future use N/A N/A
P-6 Unused - Reserved for future use N/A N/A
P-7 Unused - Reserved for future use N/A N/A
P-8 Unused - Reserved for future use N/A N/A
P-9 Display Brightness Control 13 = Maximum 4 = Low
13 = Maximum
P-10 Display /F or /C/F/F = Fahrenheit Displayed
/C = Celsius Displayed
P-11 Outside Air Temp Sensor - Only when
Alt Air Sensor is Not Required
OFF OFF = Alt Air Connected
On = OAT Sensor Only
P-12 Reverse Fan Speeds in Heating Mode rEF = Reversed nor = Normal Fan Operation
rEF = Reversed in Heating
P-13 Continuous Fan or Cycle Fan on
Demand
con = Continuous
Fan Operation
CYC = Cycle On Demand
con = Continuous
P-14 Hot Water Heating Only or Electric Heat
Option Installed
nor = Hot Water Heat nor = Hot Water Heat only
ELE = Elect. Heat Installed
P-15 Fan Motor Type SP = Shaded Pole SP = Shaded Pole
SC = Split Capacitor
P-16 Reset Memorized Programming Defaults nor = Normal nor = Normal
rest = Reset Defaults
P-17 Water Valve Forced Open 4 Hours to
Bleed the Chillwater System
nor = Normal
Operation
nor = Normal Operation
Opn = Open
P-18 Ambient Air to Chillwater Temperature
Differential
15/F5
/F to 25/F
Should any programming problems or confusion occur, reset the memorized default settings by
entering the program mode and setting P-16 to rest.

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Page 13
P-1: High Fan Limit
The upper fan speed limit can be tailored to suit various motors and operating conditions.
The high fan limit is adjusted with the system installed and operational. The range of
values are 56 through 85 and represent arbitrary units. Setting a higher number, results
in a higher fan speed, setting lower numbers, lowers the high fan speed limit. Use the up
and down buttons to select the desired high fan speed limit. The factory default setting is
eighty-five (85).
P-2: Low Fan Limit
The low fan limit determines the lowest output allowed for the low fan speed. The range
of values for the low fan speeds are 30 through 55, in arbitrary units. Use the up and down
buttons to select the desired low fan speed limit. Setting a higher number, results in a
higher fan speed, setting lower numbers, lowers the low fan speed limit. The factory
default setting is 50.
IMPORTANT! Once the high and low fan speed limits are set, the unit will automatically
readjust the remaining fan speeds to produce six (6) equally spaced in both the
automatic and manual fan speeds modes.
P-3: Reserved For Future Options
Program item P-3 is reserved for future options.
P-4: Temperature Calibration
Use this feature to calibrate the air sensor within a range of +10 /F. Enter the program
mode and the ambient temperature appears in the display. Use the up and down keys to
select the desired offset. The temperature in the display will increase or decrease
according to the offset programmed. The factory default setting is zero.
P-5, P-6, P- 7 & P-8: Reserved For Future Options
Program items P-5, P-6, P-7 and P-8 are reserved for future options.

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Page 14
P-9: Display Brightness Control
The display brightness can be adjusted to suit ambient cabin lighting conditions. The
allowed settings are four (4) to thirteen (13), with four (4) being the dimmest and thirteen
(13) the brightest. Typically a dark cabin will require a setting of four or five. A very bright
cabin will require a setting of twelve or thirteen. The factory default setting is thirteen (13).
P-10: Fahrenheit or Celsius Selection
The unit can be programmed to display either Fahrenheit or Celsius. Programming /F
selects degrees Fahrenheit and programming /C displays degrees Celsius. The factory
default setting is /F, Fahrenheit. When degrees Celsius (/C) is selected the readings are
displayed in tenths, i.e. 22.2/.
P-11: Outside Air Sensor Option
On this unit, there is no faceplate temperature sensor. The return air sensor is plugged in
the Alternate Air Sensor jack and therefore, the outside air temperature option is not
available.
P-12: Reverse Automatic Fan Speeds During Heating
The automatic fan speeds can be reversed during the heating mode to improve personal
comfort in cooler climates. The fan speed is decreased as the temperature spread
increases. The fan will speed up as the set point is approached. Lowering the fan speed
when the cabin is cold raises the supply air temperature. The fan switches to low speed
when the set point is satisfied and the water valve cycles off. The fan can be programmed
to operate the same as in cooling by programming P12 nor which represents normal fan
operation during the heating cycle. The factory default is rEF, which reverses the
automatic fan speeds during heating.
P-13: Cycle Fan with the Cooling or Heating Demand
The fan can be programmed to run continuously when the system is on or can be allowed
to cycle with the demand. When cycled with demand, the fan will operate only when
heating or cooling is called for. To cycle the fan with the Heating or Cooling Demand select
“CYC”. To operate the fan continuously select con which represents continuous fan
operation. The factory default is continuous fan operation “con” when the system is on.

Tempwise 2001 Chillwater Digital Thermostat Manual
Page 15
P-14: Electric heating element Option
Units may be equipped with Electric heating element or an in-line electric duct heater.
Electric heating elements are used when the chillwater system is in the cooling mode and
a particular cabin requires heating. The electric heating elements are also used to
supplement chillwater heating when necessary. Program P-14 for ELE to select the
Electric heating element option. The factory default is nor which normally selects
Chillwater Heating and Cooling only. IMPORTANT: Please note that option P-14 has to
be programed for ELE to allow electric heat electric heating element operation.
P-15: Fan Motor Selection
There are two basic fan motor types, shaded pole (SP) and split capacitor (SC). Each
motor reacts differently to speed control and each motor requires different timing for
optimum fan speed variation. The default setting is "SP" which selects the shaded pole
motor type, however, "SC" should be selected if a split capacitor type of fan motor is used.
Aqua-Air Manufacturing supplies shaded pole type fan motors, therefore, the factory
default selection is "SP".
P-16: Reset Memorized Defaults
The default programming parameters can be reset by entering the program mode and
selecting “rst”. This will restore the programmable parameters to the values selected
when the system was shipped. The program parameters listed on page nine may be
altered by Aqua-Air Manufacturing, the installing dealer or the end user. Once new
defaults are entered (see page 7, dual button functions) and memorized the new defaults
will be reset. The original factory programmable parameters as listed on page twelve (12)
will have to be restored manually.
Why Memorize New Defaults?
Once the desired programming changes have been made and the system tests
satisfactorily, your work can be saved as the new factory defaults. Your new defaults are
initiated by simultaneously pressing and releasing the up and down buttons prior to exiting
the program mode. New defaults can be initialized at any time by entering the program
mode and following the above instructions. Once new defaults have been initialized the
control will revert back to the new defaults whenever factory defaults are restored as
described on page 10 of this manual.

Tempwise 2001 Chillwater Digital Thermostat Manual
Page 16
P-17: Chillwater Valve Forced Open
This feature allows service personnel to force the chillwater water valve open to facilitate
bleeding air from the system. Selecting OPn will force the valve open for 4 hours while
normal cooling and heating is maintained. The valve can be returned to normal operation
anytime during the cycle by selecting nor which stands for normal operation.
P-18: Ambient to Water Temperature Differential
The difference between ambient air temperature and chillwater water temperature is used
to control water valve opening and closing. The programmable range is five (5/F) through
twenty-five (25/F) degrees Fahrenheit. Selecting fifteen (15/F) opens the valve when water
temperature is fifteen (15/F) degrees less than ambient in cooling mode and fifteen
degrees (15/F) greater than ambient in the heating mode. Figure 3 illustrates the
relationship between ambient air and chillwater water temperature using the factory default
values.
Careful selection of the temperature differential can fully utilize the ships heating and
cooling resources. For example, while in the cooling mode and using a ten degree value,
the valve will open to allow some cooling while the chillwater system is coming down to
temperature. The programmable range is 5 to 25/F and the Factory Default Setting is
15/F.

Tempwise 2001 Chillwater Digital Thermostat Manual
Page 17
AMBIENT AIR TO WATER TEMPERATURE DIFFERENTIAL
When equipped with an optional electric heater, the heater will overlap with the chillwater
heat by twenty-two degrees Fahrenheit (22/F). The heater will turn on when heat is
required and remain on until the chillwater water temperature exceeds the ambient by
twenty-two degrees Fahrenheit or until the room temperature is satisfied.
Figure 3: Ambient Air to Water Temperature Differential
The electric heat is allowed to overlap the chillwater heat to supplement the main heating
system during very cold conditions.

Tempwise 2001 Chillwater Digital Thermostat Manual
Page 18
SPECIAL HARDWARE INSTRUCTIONS
Bimini Jumpers
The Tempwise 2001 is equipped with four (4) emergency operation jumpers... Fan, Water
Valve, Auxiliary Fan and Heater. Should any of these outputs fall, the output can be forced
On by moving the jumper to the position indicated below.
Figure 4: Bimini Jumpers Settings
IMPORTANT! The Heater Relay and Heater Bimini Jumper (JP7) are marked Compressor
Relay and COMP because the same Input / Output printed circuit board is used for both
the Tempwise 2001 (Direct Expansion Control) and the Tempwise 2001 (Chillwater
Control).
CAUTION! Allowing the Tempwise 2001 to operate with any or all of the outputs forced
On while unattended can cause serious damage to the air conditioning system and/or
vessel.
Do not leave the cabin unattended while any of the outputs are forced On.
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