Rinnai 37AHA04508KA5 Installation, Operation And Maintenance Manual page 18

Installation
THERMOSTAT WIRING DIAGRAMS
HEAT/COOL & COOL ONLY
THERMOSTATS
FIRST STAGE HEAT/COOL Y1
W
AUX HEATING
G
FAN
24VAC HOT R
24 VAC COMMON C
Figure 16 Single Stage Air Handler w/ Single Stage A/C
HEAT PUMP THERMOSTATS
FIRST STAGE HEAT/COOL Y1
AUX HEATING W
G
FAN
RVS COOLING O
24VAC HOT R
24 VAC COMMON C
Figure 17 Single Stage Air Handler w/ Single Stage Heat Pump
HEAT/COOL & COOL ONLY
THERMOSTATS
Y1
FIRST STAGE HEAT/COOL
Y2
SECOND STAGE HEAT/COOL
AUX HEATING W
G
FAN
R
24VAC HOT
24 VAC COMMON C
Figure 18 Single Stage Air Handler w/ Two Stage A/C
HEAT PUMP THERMOSTATS
FIRST STAGE HEAT/COOL Y1
Y2
SECOND STAGE HEAT/COOL
W
AUX HEATING
G
FAN
RVS COOLING O
24VAC HOT R
24 VAC COMMON C
Figure 19 Single Stage Air Handler w/ Two Stage Heat Pump
18
SINGLE SPEED
SINGLE STAGE
CONDENSING
AIR-HANDLER
UNIT
Y1 Y1
Y2
W
G
O
R
C C
SINGLE STAGE SINGLE STAGE
AIR-HANDLER HEAT PUMP
Y1 Y1
Y2
W
G
O O
R R
C C
TWO STAGE
SINGLE STAGE
CONDENSING
AIR-HANDLER
UNIT
Y1 Y1
Y2 Y2
W
G
O
R
C C
SINGLE STAGE TWO STAGE
AIR-HANDLER HEAT PUMP
Y1 Y1
Y2 Y2
W
G
O O
R R
C C
Rinnai Corporation Hydronic Air Handler Manual
Shunt Jumper Options:
An additional feature of the 37AHA series is its
selectable operating sequence option; the 3-pin shunt
header (P7) allows the control to operate the proper
heating logic based on the following system
requirements:
The 37AHA unit in Open Loop configuration:
"FS" Shunt selection: The "FS" logic sequence will
configure the unit for operation with all Rinnai® V and
VA series Tankless Water Heaters; this logic monitors
the ratio of available flow for space heating (via Flow
Sensor); this status is then communicated to the PCB
whose operating characteristics is primarily
determined by the status of the Flow Sensor input
(sequence allows domestic priority).
WARNING
Failure to follow this warning could result in an
electrical shock, fire, or death.
To minimize personal injury if an electrical fault should
occur, cabinet grounding MUST be an uninterrupted
ground and MUST comply with NEC, ANSI/NFPA 70
and all local codes having jurisdiction. The ground
may consist of electrical wire or metal conduit when
installed in accordance with existing electrical codes.