Electrical Connections
Installation and wiring shall be in accordance with
requirements of authority having jurisdiction In absence of
such requirements refer to:
• USA- National Electrical Code, ANSI/NFPA 70.
• Canada - Canadian Electrical Code, Part I, CSA C22.1:
Safety Standard for Electrical Installations.
Units Rated 208/230V:
• RetroAire unit is wired for 230V primary voltage from
manufacturer.
• Transformer must be rewired by installer if job site
voltage is 208V.
• Change transformer tap from orange to red. See wiring
diagram for details. See Figure 4 page 6 and Figure 6
page 9 for location of wiring diagram.
Setting Control Board Jumpers
Control board has two sets of factory installed jumper
pins:
HP
jumper and
TEST
jumper.
HP Jumper
— selects heat pump or straight cooling.
Pins determine whether unit operates as straight cooling or
as heat pump. See Figures 12 and 13.
• Jumper right pin to center pin for heat pump operation.
• Jumper left pin to center pin for straight cooling
operation.
TEST Jumper
— selects normal or test mode
NOTICE
Do not leave unit operating with TEST jumper in
TEST position.
• Jumper is for testing only. See Figure 13 and 14.
• When jumper pins are jumped together, all timers are
eliminated
(example — anti-short cycle, purge, etc.)
.
• May be used for field testing. Units are factory set with
jumper on only one pin
(normal operation position)
.
FINAL INSPECTION & START-UP
Heat Pump Mode
(Jumper center
& Bottom pins)
Straight
Cool Mode
(Jumper center
& Top pins)
HP
HP
Normal operation
(pins not jumped)
Test mode
(pins jumped)
Figure 12
- HP Jumper
(selects heat pump or
straight cooling)
Figure 13 - TEST jumper (selects normal or
test mode)
19
Made in USA
P/N 240010598, Rev. A [05/12/2014
]
