Operation; Cooling Sequence Of Operation - York PHE6B36 Installation Manual

Table 11: Electric Heat Multipliers
Nominal
240
1. Electric heaters are rated at nominal voltage. Use this table to determine the electric heat capacity for heaters applied at lower voltages.
Table 12: Recommended Blower Speed for Electric Heat
Model
PHE6B36
PHE6B48
PHE6B60
NOTE: The recommended HEAT speed selections above will give approximately a 45 degree temperature rise at 0.3" static with 230V power supply. If lower or higher
heating airflow is desired, or if duct static or voltage are different than specified, other speed taps may be used.
Table 13: Electric Heat Blower Off Delay
Model ID
PHE6B36
PHE6B48
PHE6B60
Table 14: Additional Static Resistance
Size (Tons) CFM Wet Indoor Coil Economizer
700 0.01
800 0.02
900 0.03
1000 0.04
36 (3.0)
1100 0.05
1200 0.06
1300 0.07
1400 0.08
1100 0.02
1200 0.03
1300 0.04
1400 0.05
1500 0.06
48 (4.0)
1600 0.07
1700 0.07
1800 0.08
1900 0.09
2000 0.09
1100 0.02
1200 0.03
1300 0.04
1400 0.05
1500 0.06
60 (5.0)
1600 0.07
1700 0.07
1800 0.08
1900 0.09
2000 0.09
1. The pressure drop through the economizer is greater for 100% outdoor air
than for 100% return air. If the resistance of the return air duct is less than
0.25 IWG, the unit will deliver less CFM during full economizer operation.
2. Filter pressure drop based on standard filter media tested at velocities not
to exceed 300 ft/min.
Johnson Controls Unitary Products
Voltage
Heater kW
10 15
C (ML) A (HI)
D (LO) C (ML)
D (LO) D (LO)
1
Filter/Frame Kit
0.00 0.04
0.01 0.06
0.01 0.08
0.01 0.10
0.01 0.13
0.02 0.16
0.03 0.17
0.04 0.18
0.02 0.04
0.02 0.04
0.02 0.05
0.03 0.05
0.04 0.06
0.04 0.07
0.04 0.08
0.04 0.09
0.05 0.10
0.05 0.11
0.02 0.04
0.02 0.04
0.02 0.05
0.03 0.05
0.04 0.06
0.04 0.07
0.04 0.08
0.04 0.09
0.05 0.10
0.05 0.11
Applied
208
230
18
--
B (MH)
C (ML)
Blower Off Delay In Seconds
SECTION VI: OPERATION
The unit is controlled by a heat pump heating/cooling thermostat.
If an electronic thermostat is used, make sure it has a common connec-
tion. DO NOT use a power stealing thermostat.
This unit has a multi-stage compressor, therefore the unit has two
stages of mechanical heat, and two stages of mechanical cooling. The
unit may be controlled using a single stage heat / single stage cool (1H/
1C) heat pump thermostat, but the second stage cooling or heating is
not available unless the unit control is physically wired for full capacity
operation. For optimum performance, it is recommend to use a four
stage heat / two stage cool (4H/2C) heat pump thermostat. If a 15 kW or
smaller heat kit is installed, use a three stage heat / two stage cool (3H/
2C) heat pump thermostat.

COOLING SEQUENCE OF OPERATION

A call for a compressor cooling signal from the thermostat is initiated at
the "Y1" terminal (for OD compressor) and the "O" terminal (for revers-
ing valve).
The control cycles the compressor and indoor blower to second stage
cooling speed anytime a second stage cooling "Y2" call is received
during a first stage cooling "Y1" call. The control does not operate on
second stage cooling without a call on the "Y2" thermostat input.
1. On a call for cooling, the thermostat sends 24 volts to "Y" and "O" on
the defrost control board. The reversing valve solenoid is energized.
After the antishort cycle period is complete, the contactor coil "M" is
energized. Power is supplied to the compressor and outdoor fan
motor, and the reversing valve is switched to the cooling position.
The indoor blower is controlled by the indoor blower control board. It
operates on the "LOW COOL" or "HIGH COOL" speed based on the
24 VAC input from the defrost control board. If the control receives an
"O" input without a "Y" input, it energizes the reversing valve only.
2. When the demand for cooling has been satisfied, the 24 volt "Y"
signal is removed, and the contactor is de-energized. The indoor
blower motor continues to run and ramps down after a 60 second
delay.
5285477-UIM-A-1016
1
kW Capacity Multipliers
0.75
0.92
20 25
-- --
A (HI) --
B (MH) A (HI)
60
110
110
13