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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
109 68-0311—01
Fig. 217. 2-Wire Zone Valve with end switch.
Fig. 218. Series 20 hot water heat.
Fig. 219. AQ2000 series panels or other hot water relay
panels.
Fig. 220. Heat pump with oil forced air backup.
TRANSFORMER
THERMOSTAT/EIM
R IS JUMPERED TO RH.
THE BOILER CONTROLS THE CIRCULATOR PUMP IN THIS SYSTEM.
BOILER
W W2 W3 Y Y2 G A
M31477
24
VAC
120
VAC
T
T
R
C
ZONE VALVE
TR
TH
END
SWITCH
1
1
2
2
TRANSFORMER
R IS JUMPERED TO RH.
1
EIM
W W2 W3 Y Y2 G A
M31478
24
VAC
120
VAC
R
C
SERIES 20 VALVE
C
R(5) B(4) W(6)
1
TRANSFORMER
REMOVE THE JUMPER FROM RH TO RC WHEN USED WITH
AQ2000 SERIES PANEL.
1
THERMOSTAT/EIM
RC RH W W2 W3 Y2 G
M31479
24
VAC
120
VAC
R
C
HOT WATER RELAY PANEL
ZONE 1
RH
W
1
O/B
AUX1
AUX2
O
Y
Y2
G
R
C
L/A
TO THERMOSTAT
THERMOSTAT/EIM
HEAT PUMP
HEAT PUMP
M31480
1
RELAY
3
1
OIL FURNACE
T
T
THE BOILER IS CONTROLLING THE CIRCULATOR PUMP IN THIS DIAGRAM
Y2 USED WITH HEAT-PUMPS THAT HAVE 2 COMPRESSOR STAGES.
1
2
2