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145
HVAC
Functions Of The Zone Control
Board
The Zone Control Board (Figure 8-5) contains seven
green LED’s for Power, Zone 1, 2, 3, 4 and 5 Thermostats,
and Potable Water.
It also contains nine matched pairings of red/green LED’s
for Zone 1, 2, 3, 4 and 5 Fans, Summer Loop, Heat Loop 1,
Heat Loop 2, and Engine Pre-heat Pump.
For the Zone Control Board to respond to a call for heat,
the coolant temperature inside the Oasis® Chinook must
be above 120F.
The Oasis® Chinook has a single space heating loop. The
“series” jumper on the zone board (below the bypass
jumper, to the left of the largest relay on the board) must
be put in place. If the “series” jumper is not put in place,
then the thermostats calling for heat in zones 3, 4, and 5
will not activate the Heat Loop 1 pump, which is the only
space heating pump in this system. This will result in cold
air blowing from the fans when only zones 3, 4, or 5 are
calling for heat.
When the “series” jumper is not in place, the zone control
board uses Heating Loop 1 to supply coolant to Zones
1 and 2, and uses Heating Loop 2 to supply coolant to
Zones 3, 4, and 5. Zones 1 and 2 are calling for heat, the
zone control board will activate the Heat Loop 1 pump.
When Zones 3, 4, and 5 are calling for heat, the zone
control board will activate the Heat Loop 2 pump.
When the Engine Pre-Heat switch is turned ON, the
Zone Control Board will turn on the Summer Pump and
circulate hot coolant through the engine heat exchanger.
At the same time, the engine pre-heat pump will turn ON
and circulate the engine coolant through the engine heat
exchanger.
The Summer Loop is an automatic action of the Oasis
system and requires no action from the user. It works
like a stir pump and causes water to flow through the
heat exchanger when hot water is desired and the
heat zones are not actively circulating.
NOTICE
!
POWER LED (GREEN)
The power LED turns ON when the power to the Zone
Control Board is ON.
ZONE 1, 2, 3, 4, 5 THERMOSTAT LED’S
(GREEN)
The Zone # LED turns ON when the thermostat in the
zone is calling for heat.
POTABLE WATER LED (GREEN)
The potable water LED turns ON when there is a call for
potable hot water.
ZONE 1, 2, 3, 4, 5 FANS, SUMMER LOOP,
HEAT LOOP 1, HEAT LOOP 2, ENGINE
PRE-HEAT PUMP PAIRED LED’S (RED/
GREEN)
The nine paired LED’s indicate the functionality of the
corresponding devices. The green LED will turn ON when
the device is operating normally. The red LED turns ON if
a fuse has been blown.
Source(s): ITR Oasis Chinook Heating System Installation and
Operating Manual: Diesel and AC Heating System for Recreational
Vehicles and Mobile Homes
Product(s): ITR Oasis Chinook Heating Base Unit (Model: 59000,
Newmar Part Number: 144634)
When the potable hot water is turned ON, the Zone
Control Board will turn on the Summer Pump and
circulate hot coolant through the internal potable water
heat exchanger.
When the Burner is turned ON, the Zone Control Board
will turn on the Summer Pump and circulate hot coolant
through the internal circuit, to provide even heating in the
coolant tank.
How to Operate the Hydronic Heating Front Fan
The switch is only active when the hydronic heat is up
to temperature and the living room zone is calling for
heating. When these conditions are met, the driver
can use the switch to control the fan speed (low or
high) or turn the fan off.
NOTICE
!
The
Front Fan Switch
on the dash controls
the speed of the under-dash hydronic
heating fans.
Summary of Contents for LONDONAIRE 2022
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