B-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
96 of 147
FIGURE 54: AM Style for 2010 and 2010B
FIGURE 55: AM Style for 2020 - 2030
HIGH LOW
1
2
(L1)
(L2)
120V
B
R
W
20VA
61
60
62
2
4
120V
MODULATING
DAMPER MOTOR
ADJUSTING OUTSIDE/
RETURN AIR RATIO
OPERATION:
BULDING PRESSURE INCREASES, DAMPER GRADUALLY
OPENS RETURN AIR SUPPLY UNTIL DESIRED BULDING
PRESSURE HAS BEEN OBTAINED.
BUILDING PRESSURE DECREASE CONTROLS REVERSE
PRESET TO 0.1"(LOW) AND 0.25"(HIGH)
L1 L2
T1 T2
MODULATING
REGULATING
VALVE
REDUCED FLOW SWITCH
49A
48
R4B
49
NC C
ADJUSTMENTS:
1) MAKE NORMAL HIGH AND LOW FIRE ADJUSTMENTS WITH
SWITCH CLOSED AS OUTLINED IN THE MANUAL
2) THE REDUCED HIGH FIRE SETTING IS PRESET AT THE
FACTORY AND MUST NOT BE ADJUSTED.
29
2
R4B
1
THIS REPLACES THE MRV WIRING
LOCATED ON THE MAIN DIAGRAM
DAMPER SWITCH CHANGES WHEN UNIT RECIRCULATING
DAMPER IS IN THE FULL RECIRCULATING POSITION
Damper Switch
DM2
0
.25
.25
PHOTOHELIC
+
-
BUILDING
PRESSURE
BLDG
PHOTOHELIC PNEUMATIC DIAGRAM
Part Number
Description
Models
AM
AM Control Wiring
2010 and 2010B
MODULATING
DAMPER MOTOR
ADJUSTING OUTSIDE/
RETURN AIR RATIO
OPERATION:
BULDING PRESSURE INCREASES, DAMPER GRADUALLY
OPENS RETURN AIR SUPPLY UNTIL DESIRED BULDING
PRESSURE HAS BEEN OBTAINED.
BUILDING PRESSURE DECREASE CONTROLS REVERSE
PRESET TO 0.1"(LOW) AND 0.25"(HIGH)
MODULATING
REGULATING
VALVE
REDUCED FLOW SWITCH
49A
48
R4B
49
NC C
ADJUSTMENTS:
1) MAKE NORMAL HIGH AND LOW FIRE ADJUSTMENTS WITH
SWITCH CLOSED AS OUTLINED IN THE MANUAL
2) THE REDUCED HIGH FIRE SETTING IS PRESET AT THE
FACTORY AND MUST NOT BE ADJUSTED.
29
2
R4B
1
THIS REPLACES THE MRV WIRING
LOCATED ON THE MAIN DIAGRAM
DAMPER SWITCH CHANGES WHEN UNIT RECIRCULATING
DAMPER IS IN THE FULL RECIRCULATING POSITION
Damper Switch
DM2
0
.25
.25
PHOTOHELIC
+
-
BUILDING
PRESSURE
BLDG
PHOTOHELIC PNEUMATIC DIAGRAM
(L1)
(L2)
120V
L2
L3
L1
60
62
2
120V
DM2
HIGH LOW
1
2
S1
S3
1
Part Number
Description
Models
AM
AM Control Wiring
2020 - 2030
Summary of Contents for 2005
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