ClimateMaster Tranquility TCH 024 - Piping System Cleaning and Flushing

climatemaster.com
63
Tranquility
®
Compact (TC) Series
Rev.: July 7, 2020
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Piping System Cleaning and Flushing
CAUTION!
CAUTION! DO NOT use “Stop Leak” or similar chemical
agent in this system. Addition of chemicals of this type to
the loop water will foul the heat exchanger and inhibit unit
operation.
Piping System Cleaning and Flushing
Cleaning and ushing the WLHP piping system is the
single most important step to ensure proper start-up
and continued efcient operation of the system.
Follow the instructions below to properly clean and ush
the system:
1. Ensure that electrical power to the unit is
disconnected.
2. Install the system with the supply hose connected
directly to the return riser valve. Use a single length
of exible hose.
3. Fill the system with water. DO NOT allow system to
overow. Bleed all air from the system. Pressurize
and check the system for leaks and repair as
appropriate.
Models with Waterside Economizer also manually
open economizer valve and coil air vents (2) to bleed
air from coil.
4. Verify that all strainers are in place (ClimateMaster
recommends a strainer with a #20 stainless steel
wire mesh). Start the pumps, and systematically
check each vent to ensure that all air is bled from the
system.
5. Verify that make-up water is available. Adjust make-
up water as required to replace the air which was
bled from the system. Check and adjust the water/air
level in the expansion tank.
6. Set the boiler to raise the loop temperature to
approximately 86°F [30°C]. Open a drain at the
lowest point in the system. Adjust the make-up
water replacement rate to equal the rate of bleed.
7. Rell the system and add trisodium phosphate in
a proportion of approximately 150 gallons [1/2 kg
per 750 l] of water (or other equivalent approved
cleaning agent). Reset the boiler to raise the loop
temperature to 100°F [38°C]. Circulate the solution
for a minimum of 8 to 24 hours. At the end of this
period, shut off the circulating pump and drain the
solution. Repeat system cleaning if desired.
8. When the cleaning process is complete, remove the
short-circuited hoses. Reconnect the hoses to the
proper supply, and return the connections to each of
the units. Rell the system and bleed off all air.
9. Test the system pH with litmus paper. The system
water should be in the range of pH 6.0 - 8.5 (see
table 3). Add chemicals, as appropriate to maintain
neutral pH levels.
10. When the system is successfully cleaned, ushed,
relled and bled, check the main system panels,
safety cutouts and alarms. Set the controls to properly
maintain loop temperatures.
Note: The manufacturer strongly recommends all piping
connections, both internal and external to the unit, be
pressure tested by an appropriate method prior to any
nishing of the interior space or before access to all
connections is limited. Test pressure may not exceed
the maximum allowable pressure for the unit and all
components within the water system. The manufacturer
will not be responsible or liable for damages from water
leaks due to inadequate or lack of a pressurized leak
test, or damages caused by exceeding the maximum
pressure rating during installation.