Rinnai CAH Series, Instalation And Operating Manual

Page: 24 / 44

24 Canadian Air Handler Installation and Operation
The CAH050CE model air handler will have an
included accessory Grundfos UPS 15 - 78
circulator pump. The CAH050E model air
handler does not have an included circulator
pump. If utilizing the air handler with a Rinnai
I - Series combi boiler, the accessory pump is not
necessary as the boiler already has a pump
included inside the boiler. If desired to install a
pump other than the Grundfos UPS 15 - 78, this
would need to be a field - supplied component.
L
1
N N
P
Air Handler
Pump Power
Supply
1. Mount the thermostat approximately 5 ft.
(1.5 m) from the floor and close to, or in, a
frequently used room, preferably on an
inside partitioning wall or a section of wall
without pipes or duct work.
2. Connect the thermostat to the air handler.
Follow the wiring diagrams in the next
section:
“5.4.1 Thermostat Wiring
Diagrams. ”
Refer to section “4.6 Thermostat Requirements ”
for thermostat installation requirements.
All capacity and performance data is based on
the Grundfos UPS 15 - 78. If other pumps are in
use, results will vary. The pump does not have
an integrated check valve. An external one
should be field supplied and installed.
NOTE
The pump is to be wired back to the air handler
for power (see below image) and plumbed into
the inlet side of the air handler piping (see
plumbing diagram).
Connect common (C) wire only if
required. See thermostat installation instructions
for more information.
NOTE
P = Pump Line Wire Terminal
N = Pump Neutral Terminal
N = Air Handler Neutral Terminal
L1 = Air Handler Line Wire Terminal