Step 3—Quick Check of Equipment Operation
Either this or the next step (Step 4) may be used for initial startup.
This check runs equipment for only 2 minutes on each stage and is
adequate to see that each stage comes on properly. For temperature
rise, charge levels, etc. use the longer check, or disable zoning
feature.
Be sure installer setup is still selected (Equipment Controller DIP
switch No. 6 is OFF).
At User Interface, select HEAT mode. The first stage of heat will
come on immediately (no temperature demand is needed). For a
heat pump, this will be Y1 and G. For an air conditioning system,
this will be W1. The first stage will remain on for 2 minutes. Then
the second stage of heat will come on for 2 minutes. This will be
Y1, Y2, and G for a heat pump, or W1 and W2 for an air
conditioning system. At the end of 4 minutes, equipment will turn
off and mode will automatically return to OFF. If mode is set to
OFF at any time during 4 minutes, equipment will turn off
immediately. Note that single stage system (heat or cool) will
remain on for full 4 minutes because there will be no connection
to Y2 or W2.
The same applies to COOL. When selected, cooling will come on
immediately with no need for temperature demand. First stage will
be Y1, G (and O if a heat pump) and will run for 2 minutes. Then
Y1, Y2, G (and O if a heat pump) will come on for next 2 minutes.
At the end of 4 minutes equipment will turn off and mode will
return to OFF.
In a heat pump system, EHEAT may also be selected at User
Interface. This will turn on W1 only for first 2 minutes and then
W1 and W2 for the second 2 minutes. The compressor will not run.
As above, equipment may be turned off at any time during the 4
minutes by setting mode to OFF.
For all operation in this installer setup mode, no demand is needed,
no compressor timeguard exists, and no temperatures are moni-
tored. This means there is no protection for equipment, and this is
the reason that operation is limited to 4 minutes.
When leaving this step, be sure to return installer setup switch
(Equipment Controller DIP switch No. 6) to ON position. This will
enable normal operation.
When any output is turned on, a red LED on the Equipment
Controller board adjacent to the output’s connection terminal is
also turned on. This can be used at any time to monitor the state of
the Equipment Controller outputs, even if the equipment is not yet
connected or powered. Remember, the DEHUM output is a reverse
logic relay. This means its LED will be ON while there is no
dehumidify demand. See dehumidification section.
Step 4—Longer Check of Equipment Operation
When more detailed tests need to be made on equipment, the 2 or
4 minute run time provided in Step 3 may not be adequate. By
selecting disable zoning mode (turn Option No.35 to ON under
User Interface configuration), system operates like a standard
thermostat system. All dampers go fully open, and the zone which
is displayed on User Interface provides set points. This zone’s
temperature is the only controlled temperature. Equipment will
operate as if it were being controlled by a single thermostat in the
displayed zone. Use this option to check out equipment as you
would with a normal thermostat. When finished, be sure to return
to the configuration mode and turn Option No.35 OFF to enable
normal zoning operation.
FINAL INSTALLATION SETTINGS
Humidification Description
If a humidifier is included in the system, Comfort Zone II -B can
directly control it. If a conventional humidity control exists, it
should be removed and the zoning system used in its place.
Comfort Zone II -B provides superior convenience and features.
When installing a 24-vac humidifier, connect it directly to the
HUM terminal on the Equipment Controller and C terminal of
indoor equipment.
DO NOT connect furnace HUM terminal directly to Equip-
ment Controller HUM terminal. This will bypass furnace
safety controls. See Low Voltage Wiring Diagrams and notes
for proper connection.
A humidity sensor is built into the User Interface to monitor and
control relative humidity. The HUM output will control any
humidifier with a 24-vac input. A humidify set point can be set to
any value between 10 percent and 45 percent or can be turned off.
When the humidity drops 2 percent below the set point, the HUM
output is activated to turn on a humidifier. When the humidity rises
2 percent above the set point, the HUM output will turn off.
When an outdoor air temperature sensor is attached, an automatic
humidity level adjustment can be selected. This selection provides
a 1 percent reduction in the humidity set point for every 2 degrees
reduction in outdoor temperature. The set point can be changed at
any time, and it will then automatically adjust itself up and down
with changes in outdoor temperature. In no case will the set point
go above 45 percent or below 10 percent. This feature is to prevent
sweating of windows in very cold weather while allowing higher
humidity levels in warmer weather.
Another selection involves the interlocking of the HUM output to
heating or fan operation. The HUM output can be set to come on
only when there is a humidity demand and any heat output is on
(heat pump, furnace, or auxiliary heat). A second setting allows the
HUM output and the blower to turn on when there is humidity
demand. This selection allows humidification with the fan when
there is a no heat call. In no case will the HUM output be on
without either heat or fan.
It may be advisable to configure the humidity control as part of the
installation process. Following is a brief description of the hu-
midify setup process. It is also covered in the Owner’s Manual.
There are 5 selections for humidification in the heating mode:
1. Normal Humidify
2. Fan Humidify
3. Auto Humidify
4. Auto and Fan Humidify
5. OFF
Humidification Setup
To make a humidification selection or change the humidity (hu) set
point, a 2-button keypad press is required. Press SET TIME/TEMP
and FAN buttons simultaneously (indicated on keypad by the RH
symbol) to enter humidity mode. Either hu (humidify) or dh
(dehumidify) will appear in the clock display. Use the SET
TIME/TEMP button to select hu. The actual humidity now appears
in the large display, the humidify set point appears in the heat set
point display, and the small triangle icon below the set point is
turned on when the humidify output is active. The UP and DOWN
buttons now adjust the humidify set point and the MODE button
scrolls through the 5 available humidification modes. These are
described below. Table 1 shows the display indication for each of
the 5 humidification modes.
1. Normal Humidify Mode—This is the factory default. In
Normal Humidify, the humidifier will be on only if there is a
humidify demand and any heating equipment is on. This will
include furnace, heat pump, or auxiliary heat. In heat pump
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