14
14.2 Circulator Blower
This air handler is equipped with a variable speed circulator
blower. This blower provides several automatically-adjusted
blower speeds. The Specification Sheet applicable to your
model provides an airflow table, showing the relationship be-
tween airflow (CFM) and external static pressure (E.S.P.). For
heater kit installation, it is important to set the capacity of
the electric heater at two locations
Set-up menu
(“HT KIT(kW)”) of thermostat
Section 17.4 lists details for heater kit capacity selection. Con-
firm if the selection is correctly done from CONFIGURATION
menu (section 17.1) of the ComfortNet™ systems Advanced
feature Menus.
Indoor blower airflow (CFM) for a particular heater kit selec-
tion can be checked using the STATUS menu (section 17.5) or
from the 7-segment display on the control board. (See sec-
tion SETTING THE MODE DISPLAY).
NOTE: Upon start up in communicating mode the circuit board
may display an “Ed” error. This is an indication that the DIP
switches on the control board need to be configured in accor-
dance with the Electric Heating Airflow Table. Configuring the
DIP switches and resetting power to the unit will clear the
error code.
CAUTION
Do not change any other dip switches other than
S9 to S12. Incorrect settings may cause any error.
For default setting, see Figure 14.
14.3 AVPEC Motor Orientation
If the unit is in the upflow position, there is no need to rotate
the motor. If the unit is in the downflow position, loosen mo-
tor mount and rotate motor as shown in the AVPEC Motor
Orientation Figure 16. Be sure motor is oriented with the fe-
male connections on the casing down. If the motor is not
oriented with the connections down, water could collect in
the motor and may cause premature failure.
14.4 Accessory Contacts
The control is equipped with an Accessory Relay and a pair of
¼ inch accessory terminals which is normally open, labeled
ACC-IN and ACC-OUT (see accessory contacts graphic). The
Accessory Relay can be configured to close with humidifica-
tion functionality or to close anytime the blower is running. A
closed relay means the two terminals will have continuity be-
tween them (the control does not energize these contacts).
The set-up menu is where this configuration takes place.
(HUM) Humidifier
For the setup for humidification functionality, the
accessory terminals have 3 operational modes.
1. ON: Humidifier is only enabled during a call for heat.
During a heat call the accessory relay will close only
if there is an active call for humidification from the
thermostat. Otherwise, the relay will be open.
2. OFF: Humidifier remains off (relay never closes).
FEMALE CONNECTIONS
SIDE VIEW
W
RNING
SOFTW
RE VER.
TOP
FRONT VIEW
AVPEC MOTOR ORIENTATION
Figure 16
AVPEC25B14 AVPEC37C14 AVPEC59D14 AVPEC61D14
First Valid Heater Kit 3 5 5 5
Second Valid Heater Kit 5 6 6 6
Third Valid Heater Kit 6 8 8 8
Fourth Valid Heater Kit 8 10 10 10
Fifth Valid Heater Kit10151515
Sixth Valid Heater Kit X 19 20 20
Seventh Valid Heater Kit X X X 25
DIP Switch Setting
MODE
HEATER KIT OPTIONS
Table 8
NO Heater Kit OFF* OFF* OFF* OFF*
First Valid Heater KitONONONON
Second Valid Heater KitONONONOFF
Third Valid Heater Kit ON ON OFF ON
Fourth Valid Heater Kit ON ON OFF OFF
Fifth Valid Heater Kit ON OFF ON ON
Sixth Valid Heater Kit ON OFF ON OFF
Seventh Valid Heater Kit ON OFF OFF ON
Note: Default factory settings are marked with *
Switch 12
(S12)
Heater Kit
Selection
DIP SWITCH SETTING
Table 9
DIP SWITCH SETTING
Function Function
Switch 9
(S9)
Switch 10
(S10)
Switch 11
(S11)
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