W2W Series Heat Pump
Ecologix Heating Technologies Inc
Page
14
www.ecologix.ca
221 Holiday Inn Drive Cambridge ON
ph: 519-658-4330
UNIT STARTING & OPERATING CONDITIONS
Operating Limits
Environment
– This unit is designed for indoor
installation only.
Power Supply
– A voltage variation of +/– 10%
of nameplate utilization voltage is acceptable.
Starting Conditions
W Series Units
– Units can start and operate in
an ambient temperature of 45°F with entering
load side at 50°F, entering source side at 30°F,
with both at the stated flow rates of 3gpm per ton
for initial winter start-up.
Notes:
1. These are not normal or continuous
operating conditions. It is assumed that
winter start-up is to bring the building
space up to occupancy temperatures.
2. Voltage utilization range complies with
ARI Standard 110.
Determination of operating limits is dependent
primarily upon three factors:
1. Entering load temperature.
2. Entering source temperature
3. Ambient temperature.
When any one of these factors is at minimum or
maximum levels, the other two factors should be
at normal levels to ensure proper unit operation.
Extreme variations in temperature and humidity
and corrosive water will adversely affect unit
performance, reliability, and service life.
Table 6: Operating Limits
Source Side Water Limits
Cooling
Heating
Minimum Entering Water
50ºF [10ºC]
20ºF[-6.6ºC]
Normal Entering Water
85ºF[º29.4C]
60ºF[15.6ºC]
Maximum Entering Water
110ºF[43.3ºC]
70ºF[21.1ºC]
Load Side Water Limits
Minimum Entering Water
50ºF[10ºC]
60ºF[15.6ºC]
Normal Entering Water
60ºF[15.6ºC]
100ºF[37.8ºC]
Maximum Entering Water
90ºF[32.2ºC]
120ºF[48.9ºC]
PIPING SYSTEM CLEANING & FLUSHING
Cleaning and flushing of the piping system is the
single most important step to ensure proper start-
up and continued efficient operation of the
system. Follow the instruction below to properly
clean and flush the system:
1. Verify electrical power to the unit is
disconnected.
2. Using a pump cart and the three-way valve
connections shown in the installation
drawings refill the system with water.
3. Bleed all air from the system as described in
the applications section of this manual.
Pressurize and check the system for leaks
and repair appropriately.
4. Set the back up electric heater or fossil fuel
fired boiler system to raise the loop
temperature to approximately 85°F. Open a
drain at the lowest point in the system.
Adjust the make-up water replacement rate
to equal the rate of bleed.
5. Drain and refill the system adding tri-
sodium phosphate in a proportion of
approximately one pound per 150 gallons of
water (or other equivalent approved cleaning
agent). Reset the heater to raise the loop
temperature to about 100°F. 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.
6. When the cleaning process is complete refill
the system and bleed off all air.
7. Test the system pH with litmus paper. The
system water should be slightly alkaline (pH
