Coolerado C60A, Руководство по установке

Страница: 16 / 53

Coolerado Installation
Page
16
of 53
NOTE: If incoming water pressure is in excess of 80 psig (550
kPa), a pressure-reducing valve should be installed to the
incoming water supply line.
WATER PRESSURE REQUIREMENTS
NOTE: If incoming water pressure is ever less than 25 psig
(172 kPa) when the unit is running, a water pressure booster
pump may be required. District water line pressures are
often decreased due to irrigation activities, especially at
night. A minimum building pressure is generally 40 psi to
maintain the pressure at the unit of 25 psi when
considering water filter pressure drop, perhaps a water
softener, toilets being flushed, the units may be mounted
on the roof causing pressure loss due to gravity and height,
and the irrigation system running.
Low Water Pressure:
In certain locations, a reduction or potential loss of water
pressure can occur due to high demand conditions on the
municipal or district water supply. Install a booster pump to
ensure water pressure is maintained. If required, mount
booster equipment near ground level, see
Figure 24 .
Check Valve, CV
Booster
Pump
Pressure
Tank
Pressure
Gauge
Union
Relief Valve
Pressure
Sensor
Circuit Breaker
Disconnect (110VAC, 20 amp)
Control for Booster Pump
Need 25 psi (172 kPa)
Minimum at Coolerado Unit
By Contractor:
CV
Main Water Line
Hose Bib
Ball Valve
Water Booster, Hose Bib, and Ball Valve, Figure 24.
NOTE: Use a minimum of 1/2” (12.7 mm) diameter supply
water line, which should be free draining for winter shut
down.
BACK FLOW PREVENTION
NOTE: The unit is equipped with a self-draining water
regulating valve designed with a vacuum break in the HMX.
Water Distribution System – M50A, Figure 25
Freeze protection can be done manually:
1.) Install supply water shut off valve between the
water supply line and the unit.
2.) Install a drainage valve downstream of the manual
water valve. The drain valve should be located within
a conditioned space.
3.) Slope the line from the unit to the drain valve for
proper draining and freeze protection.
4.) To drain the line and water distribution system it
must be turned on for a few minutes to allow the
water to drain and air to pulled into the system. This
is done by turning the thermostat to require a cool
call.
WATER DISTRIBUTION SYSTEM
The water distribution system, (located inside the unit) is a
combination pressure regulator, 24 VAC solenoid valve and
water distributions manifold. The valve is designed to
deliverer the correct water flow to each of the systems heat
exchangers.
NOTE: Water Distribution System pressure should be
adjusted in the field according to:
20 30 40 50 60 70 80 90
M50 Watts 5.6 5.9 5.8 5.2 4.7 4.3 4.0 3.7
C60 Watts 5.0 5.8 5.9 5.5 5.0 4.6 4.2 3.9
M30 Watts
5.7
5.3 5.1 4.8 4.6 4.3 4.0 3.7
IRV-WPD Pressure Table - Vertical Pressure Gauge
Unit Type
Regulator
Type
Inlet Dynamic Pressure (psi)
Header Dynamic Pressure (psi)