5-565.1
18
oPtions
All units include the standard (STD) features. The unit
must be reviewed to determine the optional (OPT)
features that may have been supplied with the unit.
(1) discharge thermostat – (oPt)
The discharge thermostat is factory installed in the discharge
air stream of the unit. For additional information, refer to
the thermostat vendor literature provided in the literature
packet with the unit.
note: Model Sizes 500-960 contain multiple furnaces so
multiple thermostats/sensors may be included. The
thermostat(s) provided can be one of the following:
a) Two-stage Capillary Type Thermostat – The thermostat
includes a thermostat body that is factory installed for
cooling package units below the unit junction box. For
blower package units the thermostat is factory wired
and capilary is to be field installed in duct work. The
thermostat body contains the discharge air set point
adjuster that must be field set.
figure 18.2 - two-stage capillary type thermostat
options - factory installed
figure 18.1 - factory mounted option locations
(Shown with cover removed)
Thermostat body
Box
Control
Electrical
Duct Furnace
R
B
W
W
B
R
Left
Right
Adjuster
Setpoint
Capillary
Duct
Furnace
Electrical
Control
Box
Thermostat body
(Shown with cover removed)
Setpoint
Adjuster
Capillary
45
43
40
38
36
34
Units with Premium Control Box
32
30
9
46
48
12
13
10
50
49
52
51 55
47
4
6
5
1
2
3
8
27
25
23
21
19
17
15
16
18
20
22
24
26
14
44
42
39
37
35
33
31
1. Discharge Thermostat
2. Low Gas Pressure Switch
3. High Gas Pressure Switch
4. Power Exhauster
5. Timed Freeze Protection
6. Ignition Controller
8. Control Relay
9. Differential Pressure Switch
10. Furnace Low Voltage Terminal Strip
12. Furnace Supply Power Terminal Strip
13. Control Step Down Transformer
14. Control Relay
15. Blower Low Voltage Terminal Strip
16. Dead Front Disconnect Switch
17. Step Down Transformer Fuses
18. Step Down Transformer
19. Factory Installed Minimum Positioner
20. Extended Grease Line Zerk Fittings
21. Extended Grease Lines
22. Return Air Fire Stat
23. Blower Housing
24. Pillow Block Bearings
25. Blower Motor
26. Filters
27. Fresh Air Damper
30. Direct Drive Damper Actuator
31. Enthalpy Controller
32. Damper to Damper Linkage
33. Return Air Damper
34. Proportional Temp Controller Sensor
35. Motor and Blower Vibration Isolation
36. Blower Support
37. Convenience Outlet
38. Blower Door Switch
39. Dirty Filter Switch
40. Motor Starter/VFD Control
42. Proportional Temp Controller
43. Warm-Up Stat
44. Blower Supply Power Terminal Strip
45. Service Switches
46. Electronic Modulating Amplifier
47. Electronic Modulating Gas Valve
48. Air Flow Proving Switch
49. High Limit Switch
50. Supply Air Fire Stat
51. Main Gas Valve
52. Burner Box
55. Time Delay Relay
