255427-YTG-F-1006
Unitary Products Group
11
APPLICATION FACTORS - RATED CFM VS. ACTUAL CFM
% OF RATED AIR FLOW
80%
90%
RATED CFM
110%
120%
CAPACITY FACTOR
0.96
0.98
1.00
1.02
1.03
Typical Applications with MC Multi-Position Coils
Up Flow
Down Flow
Horizontal Right
Horizontal Left
COOLING MODELS WITH ELECTRIC HEAT
MA SERIES - Air Handler Control Wiring
Typical A/C - Cooling only Applications
THERMOSTAT
AIR HANDLER
BOARD
1 - STAGE
AIR CONDITIONING
R
R
G
Y
W1
W2
C
G
W1
W2
Y
C
Y / Y2
Y1
O
HUM
X / L
COM
HUMIDISTAT *
THERMOSTAT
AIR HANDLER
BOARD
1 - STAGE
AIR CONDITIONING
R
R
G
Y
W1
W2
C
G
W1
W2
Y
C
Y / Y2
Y1
O
HUM
X / L
COM
HUMIDISTAT *
MA SERIES - Air Handler Control Wiring
Typical A/C with Electric Heat Applications
CONTROL WIRING - MV SERIES
CONTROL WIRING - MA Series - Air Handler & New UPG HP Systems
Two Stage H/P with York Guard VI Board & Copeland “Ultra Tech”
Conventional Application - Not Hot Heat Pump
THERMOSTAT
AIR HANDLER
BOARD
2 - STAGE SCROLL
HEAT PUMP
R
R
R
G
G
Y2
E
W
W
O
O
O
X / L
X / L
X / L
C
C
Y / Y2
Y1
Y1
Y2 OUT
Y2
W2 OUT
W1 OUT
BS
W2
W1
HUM
COM
HUMIDISTAT *
Y1
