Electronic Thermostat Installation - Bosch SM024 Installation, Operation And Maintenance Manual

SM AH Series Heat Pump
Figure 11: Motor Profile Air Flow Table CFM - Two Stage Units
Fan
Model Only
SM024 450
SM036 700
SM048 900
SM060 1200
SM070 1600
Heater
Model
Model
SM024 thru 070 HK050-1XS
SM024 thru 070 HK100-1XS
SM036 thru 070 HK100-1XM
SM048 thru 070 HK150-1XM
HK150-1XM
SM048 thru 070 HK200-1XM
HK200-1XM
All heaters rated single phase 60 Hz, and include unit fan load. All fuses type "D" time delay or HACR type breaker or
HRC FORM 1. Wire size based on 60 deg. C copper conductors.
Units supplied with internal electric heat require
two (2) separate power supplies: one for the unit
compressor and one for the electric heater
elements, blower motor and control circuit.
Refer to Figure #9 for wiring instructions,
minimum circuit ampacities and maximum fuse/
breaker sizing.

Electronic Thermostat Installation

Position the thermostat subbase against the wall
so that it is level and the thermostat wires
protrude through the middle of the subbase. Mark
the position of the subbase mounting holes and
drill holes with a 3/16-inch bit. Install supplied
anchors and secure base to the wall. Thermostat
Y1 COOL/ Y2 COOL/
HEAT HEAT
500 800
1050 1225
925 1500
1500 2000
1600 2200
Figure 12: Heater Package Compatibility
KW Heater Amps
208V
4.8 17.3
9.6 34.7
9.6 34.7
14.4 52.0
14.4 34.7
17.3
19.2 69.3
19.2 34.7
34.7
Figure 10:
AUX EMERG PLUS
HEAT HEAT
800 800
1225 1225
1500 1500
2000 2000
2200 2200
Circuit MCA
240V 208V
20.0 L1/L2 27.1
40.0 L1/L2 48.8
40.0 L1/L2 49.5
60.0
40.0 L1/L2 49.5
20.0 L3/L4 21.7
80.0
40.0 L1/L2 49.5
40.0 L3/L4 43.4
wire must be 8-conductor, 18-AWG wire. Strip the
wires back 1/4-inch (longer strip lengths may
cause shorts) and insert the thermostat wires into
the connector as shown. Tighten the screws to
ensure secure connections. The thermostat has
the same type connectors, requiring the same
wiring. See instructions in the thermostat for
detailed installation and operation information.
When using a 2-cool, 3-heat thermostat both the
W1 & W2 on the Heat Pump and W2 & EM on
the thermostat must be connected together via
a jumper. (See Figure#13)
MINUS TAP COOL/
ADJ ADJ HEAT/DELAY
900 700
1400 1050
1700 1275
2300 1700
2300 1900
Max. Fuse
240V 208V 240V
30.4 30 30
55.4 50 60
56.3 50 60
56.3 60 60
25.0 25 25
56.3 50 60
50.0 45 50
8733920846 (2015/01)
Electrical | 9
A
A
B
A
A
AWG
Min.
8
6
6
6
10
6
6