BRAEMAR RPCQi EVAPORATIVE COOLERS INSTALLATION MANUAL
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5
Installation of the cooler water supply must conform to
local plumbing rules, regulations and standards.
The following specifications for the cooler water
supply are required:
Water Connection
½
”
BSP
Min Water Pressure
100kPa (15psi)
Max Water Pressure
800kPa (115psi)
Min Water Flow
8 liters/min (2.1 gallons/min)
Max Water Temperature
40°C (104°F)
Important!
If the water pressure exceeds maximum
specification then a pressure reducing valve is required
and must be supplied and fitted by the installer.
WATER REQUIREMENTS
K
J
I
H
H = Overflow
I = Tank
J = Plastic Nut
K = Threaded Bush
L = O Ring (Between H & K)
10
5
L
BLEED CONTROL
To reduce the accumulation of salts and minerals in the cooler
when running for long periods it is essential to bleed a certain
amount of water. Increased flow of make up water reduces
the salt content. The bleed rate will vary with the water supply
quality, but should initially be set to the minimum recommended
bleed rates as set out in below. If your water supply is of
poor quality, higher bleed off rates are necessary to ensure
reasonable pad life and cooler performance. Place the hose
from the bleed tap into the overflow pipe. Connect suitable pipe
work to bottom of the overflow bush so that water drains directly
to waste. Drain plumbing must be in accordance with local
regulations.
C
D
E
B
A
H
G
I
J
K
F
A = Brass Nut
B = Washer
C = Brass Adaptor
D = Plastic Elbow
E = Plastic Nut
F = Valve
G = Float
H = Overflow
I = Tank
J = Plastic Nut
K = Threaded Bush
L = O Ring (between H & K)
L
WATER SUPPLY:
Mains connection is made to the float valve fitted in the
reservoir. The float valve must be set to maintain the reservoir
water level about 10 mm below the overflow level.
The mains water supply should be fitted with a ball valve and
connection to the unit from the stopcock be made with the
appropriate copper pipe and fittings.
NOTE:
Flush the mains supply before connection to the unit to remove
any foreign matter which may foul the valve seat. Remember to
use a Pipe Cutter to cut copper pipe.
BLEED CONTROL
Max
Min
B
A
C
D
E
A = Bleed Tap
B = Min/Max Label
C = Corner Pillar
D = Supply Hose from Pump
E = Bleed Hose to Drain
The bleed control tap is located externally on a corner pillar.
Adjustment to the bleed rate is made by turning the black/
red tap control to the desired setting. Check the bleed rate
by running into a graduated container for a set time, say 10
minutes.
NOTE.
Ensure tube is not pinched when replacing pads.
RECOMMENDED BLEED RATES
MULTIPLE COOLER INSTALLATIONS WITH
EXTERNAL AIR SENSOR
Cooler electronics fitted with External Air Sensors or have a
spare RJ connector can be installed as follows;
Ensure all cooler electronics dipswitches are set to ‘OFF’ except
for the last cooler in series. The last cooler dipswitch should be
switched to ‘ON’ to ensure communication reliability.
Only 1 x External Air Sensor will operate in a multi-cooler
installation. If multiple External Air Sensors are fitted disconnect
the External Air Sensor plug from each of the cooler electronics’
except for the last cooler in the series.
UP TO 60
COOLERS WITH
TOTAL CABLE
LENGTH <500m
OR ONE EXTERNAL
AIR SENSOR
EXT
EXT
<20m
<40m
<40m
Model
L per 10min
L per hr
RPCQi75
1.2
7
RPCQi150
1.6
10
ILL3012
ILL3007
ILL3008
ILL3009
