SECTION 17: ELECTRICAL
101 of 147
17.8.7 Propane Switch Kit
The propane switch kit provides the end user with the
ability to run the air handler on either natural or
propane gas. When the end user wants to switch
from natural to propane gas, a switch (field wired and
provided by others) will open contacts powering the
modulating regulating valve. Power will be sent
through the propane switch kit where the signal will
be reduced and then sent to the modulating
regulating valve. This will cause the modulating
regulating valve to open less for the propane,
allowing for the same temperature rise.
17.8.8 Auxiliary Relay
An auxiliary relay may be added to an air handler for
either an interlock or a cu
stomer defined purpose.
Refer to the option sheet supplied with the air handler
to indicate whether the relay is wired for an intended
purpose or left unwired for a future interface. Each
relay will be double pole double throw (DPDT) type.
Maximum switching capacity on the normally open
contact is 8A, and for the booth light relay, P/N
80916.2, 15A.
17.8.9 Smoke Detector
A smoke detector interlock allows for the air handler
to operate based on signal input from the fire alarm.
MODULATING
REGULATING
VALVE
THIS REPLACES THE MRV WIRING
PROPANE SWITCH
LOCATED ON THE MAIN DIAGRAM
ADJUSTMENTS:
1) MAKE NORMAL HIGH AND LOW FIRE ADJUSTMENTS WITH
SWITCH CLOSED AS OUTLINED IN THE MANUAL
2) OPEN SWITCH, REMOVE THE BRASS CAP FROM RHEOSTAT
AND ADJUST TO REDUCE HIGH FIRE SETTING, REPLACE CAP.
49
48
8
9
49A
NC
C
PROVIDED
SWITCH FIELD
AND WIRED
Part Number Description Models
17854 Propane Switch Kit All Models
CR1
FAN ON INTERLOCK
42
BURNER ON INTERLOCK
CR1
12 2
NOT WIREDBOOTH LIGHT ON
Part Number Description Models
80916 Aux Relay, Fan On All Models
80916.1 Aux Relay, Burner On All Models
80916.2 Aux. Relay Booth Light On All Models
80916.3 Aux Relay, Not Wired All Models
1
1A
FROM 120V
3A BREAKER
AIR HANDLER TERMINALS 1
AND 1A TO BE WIRED TO
FIRE ALARM N/C CONTACTS
BY OTHERS
ALL OTHER WIRING TO BE
PROVIDED BY OTHERS
Part Number Description Models
25214K Smoke Detector All Models
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