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Installation of Control Relay
Installation of Control Relay
(FR2 or FR12)
FIR-FR2-Z or FIR-FR12-Z
1. Install the Control Relay as shown in Figure 5.
NOTE: Be sure that the tab on the control relay plate is securely
engaged in the hole in the mounting flange of the heater fan panel
securing opposite corner of mounting flange with screw supplied.
2. To wire the relay, refer to wiring diagram in Figure 6 for 208V,
240V, and 277V units. See Figure 6A for 347V and 600V units.
CAUTION
!
TRANSFORMER
VOLTAGE
VOLTAGE INDICATED ON HEATER NAMEPLATE.
3. For night setback operation, refer to wiring diagram in Figure 6.
NOTE: The control relay must be energized for day operation.
Figure 5
FIR-FR2-Z OR FIR-FR12-Z
CONTROL RELAY TIME DELAY
TOP VIEW
DISCONNECT
L1
POWER
MOTOR
SUPPLY
L2
FAN DELAY
or
N
GND
CONTROL RELAY
FR2-24V
FIR-FR2-Z, 24V
FIR-FR12-Z, 120V
FR12-120V
Figure 6: FIR-FR2-Z / FIR-FR12-Z (208V, 240V & 277V units)
Figure 6: FR2 / FR12 (208V, 240V & 277V units)
DISCONNECT
L1
POWER
SUPPLY
L2
CONTROL RELAY
WIRING FROM
REMOTE
FIR-FR2-Z, 24V
CONTROL RELAY
THERMOSTAT
FIR-FR12-Z, 120V
FR2 - 24V
CONTROL POWER
FR12 - 120V
SUPPLY
GND
MOTOR
Figure 6-A: FIR-FR2-Z / FIR-FR12-Z (347V & 600V units)
Figure 6-A: FR2 / FR12 (347V & 600V units)
Figure 7
MUST
MATCH
HEATER
LIMIT
ELEMENTS
T
RED JUMPER
WIRING FROM REMOTE THERMOSTAT
CONTROL POWER SUPPLY
ELEMENT
LIMIT
TRANSFORMER
FAN DELAY
Installation of Transformer and Relay
Installation of Transformer and Relay
(F-TR4 or F-TR7)
FIR-FTR4-Z or FIR-FTR7-Z
1. Install the Transformer and Relay as shown in Figure 7.
NOTE: Be sure that the tab on the relay plate is securely
engaged in the hole in the mounting flange of the heater fan panel
securing opposite corner of mounting flange with screw supplied.
Mount transformer using 2 screws supplied.
Figure 7
TOP VIEW
2. To wire the transformer and relay, refer to wiring diagram in
Figure 8 for 208V, 240V, and 277V units. See Figure 8-A for
347V and 600V units.
DI SCONNECT
L1
POW ER
M O TOR
SUPPL Y
L2
or
N
TRANSFO RM ER
Figure 8: F-TR4/F-TR7 (208V, 240V & 277V units)
Figure 8: FIR-FTR4-Z / FIR-FTR7-Z (208V, 240V & 277V units)
DISCONNECT
L1
POWER
SUPPLY
L2
GND
CONTROL
RELAY
Figure 8-A: FIR-FTR4-Z / FIR-FTR7-Z
Figure 8-A: F-TR4 / F-TR7
(347V & 600V units)
(347V & 600V units)
3. For night setback operation, refer to wiring diagram Figure 10.
NOTE: The control relay must be energized for day operation.
Figure 10
FROM
TRANSFORMER
NIGHT SET BACK
THERMOSTAT
2
FIR-FR2-Z OR FIR-FR12-Z
CONTROL RELAY TIME DELAY
FIR-FTR4-Z OR FIR-FTR7-Z
TRANSFORMER
LI M IT
FAN DELAY
ELEM ENTS
GND
CONTROL
RED JUM PER
REL AY
TO REM O TE THERM OS TAT
ELEMENT
LIMIT
TRANSFORMER
FAN DELAY
MOTOR
TO REMOTE
24V THERMOSTAT
TO CONTROL
RELAY
TO REMOTE
THERMOSTAT
TIME
CLOCK
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