13
SAH AIR HANDLER INSTALLATION MANUAL
Electrical Data
All field wiring must comply with local and national fire,
safety and electrical codes. Be sure the available power is
the same voltage and phase as that shown on the unit serial
plate. Refer to the unit Electrical Data table for fuse and cir-
cuit breaker sizing. Line voltage power should be supplied
to the breakers on air handlers with 15kW and 20kW heater
kits (see the electric heat control section picture).
15kW and 20kW Wiring Instructions
If two separate circuits are used to supply power to the aux-
iliary heat kit, the installer will need to verify that each leg
of the auxiliary circuit breakers are wired from the power
supply correctly in order for the electric heat kit to operate
properly. This can be done by measuring the supply side
voltage of the auxiliary heat circuit breakers. Put a voltme-
ter lead on the L2 side of Circuit Breaker One and on the
L2 side of Circuit Breaker Two. The voltmeter should read
approximately 0 volts. If the meter reads high voltage, the
auxiliary heat breakers need to be rewired so that breakers
in the auxiliary heat kit match the wiring of the Disconnect
Panel breakers. Meaning, L1 and L2 from one breaker in the
disconnect panel must connect to L1 and L2 at one of the
auxiliary heat circuit breakers and L1 and L2 from the other
breaker in the disconnect panel must connect to L1 and L2
of the other auxiliary heat circuit breaker, making sure that
the L1 and L2 from each disconnect breaker matches the L1
and L2 at each of the auxiliary heat breakers.
On air handlers with 15 and 20kW heater kits, a circuit
breaker cover is provided. The installer can place the cover
on the outside of the cabinet to seal the breaker opening.
The cover will still allow operation of the breaker switches.
On air handlers with no electric heat installed, or with 5kW
and 10kW heater kits the power should be supplied to L1
and L2 lugs on PB (see air handler control section picture).
15kW and 20kW Heater Kits with Control Option C
On units with control option C that are equipped with fac-
tory installed 15 or 20kW heater kits, the installer will need
to route the wires through the electric heat current trans-
ducer that is connected to the BLACK wires. The wires that
are identified with a label will need to pass through the cen-
ter of the transducer, and will need to be disconnected from
the breakers screw lugs. Once the wires are passed through
the transducer, reconnect to the breakers and secure tightly
in the screw lugs. On 5 and 10kW heater kits, the electric
heat current transducer is factory installed.
Air Handler Control Section:
Power should be supplied to PB on air handlers with no
electric heat and 5kW or 10kW heaters.
Electric Heat Control Section:
Power should be supplied to the breakers on air handlers
with 15kW and 20kW heaters.
SAH Auxiliary Heat Minimum Blower Settings
SAH
Model
5-Speed ECM Minimum
Blower Setting
VS ECM Minimum
Blower Setting
Heater
kW
022
5
9
5
026
5
9
5
030
5
9
5
036
4
9
5
036
5
11
10
042
4
9
10
042
5
12
15
048
4
9
10
048
5
12
15
060
4
7
10
060
4
8
15
060
5
10
20
066
4
7
10
066
4
8
15
066
5
10
20
Air flow level for auxiliary heat (Aux) must be equal to or
above the minimum setting in this table
3/10/2017
Summary of Contents for SAH Series
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