Page 1
Typical A/C unit
*HP Mode
Fan
Heat *(R/V)
Power Open
Cool *(COMP)
Heat 2
Switched Output
Voltage Max 240V 10amps
Power Open
Power Close
Power Close
Damper Supply
Damper Actuator 2
Damper Actuator 1
42157 Thermostat
W/BW/B
GG
Y/OY/O
RCRC
RHRH
Heat 2
Heat 1
Fan
24V
INPUT
24Ac Fuse
Fuse
500ma
* Switch One ON
for Heat Pump Mode
( Cool relay energized with heat call)
Switch one must be in OFF for Gas Heat with
Add on Cooling Installations.
Switch two N/A
2
1
ON
Cool
W1
Relay
Common
11
Zone 1 StatZone 1 Stat
W2
GGYYRRX
Equipment Fuse
Diagnostics Leds
24Vac
Fuse
W1
NO1
15amp
Zone 2 StatZone 2 Stat
W2
NC1 Nc2
NO2
24Vac
X
SZ-2HP/240
Relay
N/A
Common
15amp
Fuse
Damper Fuse
SmartZone
2 ZONE LOGIC PANEL2 ZONE LOGIC PANEL
42157 Thermostat
W/BW/B
GG
Y/OY/O
RCRC
RHRH
Drawing Revision History
20.12.2002
Smart Temp
Installation Drawing
Drawing Name
SZ-2 HP/HC- 240 Zone control
SZ-2 HP/HC- 240 Zone control
with 42-157
with 42-157
All care has been taken in the preparation of this drawing however
Smart Temp Australia accept no responsibility for damage that may
REV A
By: JK
be caused by using this information. This is a guide only.
Ph:(03) 9899 6455
Fax (03) 9899 6454
www.smart-temp.com.au
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