45 Cowansview Road
Cambridge, Ontario, N1R 7L2
Phone: 855-658-4330
Fax: 855-658-9384
www.ecologix.ca
info@ecologix.ca
Installation Instructions
Reliance Home Comfort
ECRW Series Air Handler
Very low profile
Hot water coil
External pump
DX cooling coil
Build in filter rack
ECM high efficiency motor
ECOLOGIX HEATING TECHNOLOGIES INC.
45 Cowansview Road.
Cambridge, Ontario
N1R 7L2
Phone: 519-658-4330
Fax: 519-658-9384
info@ecologix.ca
www.ecologix.ca
Copyright (C) 2014 Ecologix Heating Technologies Inc. All Rights Reserved. This manual may not be reproduced
in whole or part by any means without prior written consent from Ecologix Heating Technologies Inc.
Ecologix and the Ecologix logo are Trademarks of Ecologix Heating Technologies Inc.
ECRW
TM
Series Air Handler Installation Instructions
Table of Contents
CHECKLIST FOR THE INSTALLER............................................................................................................. 3
TYPICAL PLUMBING CONNECTIONS........................................................................................................ 4
EQUIPMENT SPECIFICATIONS ................................................................................................................... 5
INTRODUCTION ............................................................................................................................................. 6
FEATURES ........................................................................................................................................................... 6
Rotary Speed selector knobs ............................................................................................................................. 6
Soft Start .......................................................................................................................................................... 6
Evaporator Coil Freeze Protection .................................................................................................................... 6
TT Connections ................................................................................................................................................ 6
Pump Exerciser ................................................................................................................................................ 6
Built in cooling coil .......................................................................................................................................... 6
Stainless Steel float switch ............................................................................................................................... 6
PRODUCT DESCRIPTION.............................................................................................................................. 6
Cabinet ............................................................................................................................................................ 6
Heating coils .................................................................................................................................................... 6
Fan and Motor .................................................................................................................................................. 7
Circulating pump.............................................................................................................................................. 7
Check Valve..................................................................................................................................................... 7
Plumbing kit..................................................................................................................................................... 7
Thermostat ....................................................................................................................................................... 7
EQUIPMENT SIZING AND SELECTION ...................................................................................................... 7
Procedure ......................................................................................................................................................... 7
Heat Loss / Heat Gain ...................................................................................................................................... 7
Air Handler Selection ....................................................................................................................................... 7
INSTALLATION............................................................................................................................................... 7
Air Handler Mounting ...................................................................................................................................... 7
Ductwork ......................................................................................................................................................... 8
Risk of Freezing ............................................................................................................................................... 8
Air conditioning ............................................................................................................................................... 8
Attic and crawl spaces ...................................................................................................................................... 8
ELECTRICAL................................................................................................................................................... 8
Thermostat ....................................................................................................................................................... 8
humidistat ........................................................................................................................................................ 9
START-UP PROCEDURE ................................................................................................................................ 9
SERVICE AND MAINTENANCE .................................................................................................................... 9
Filter ................................................................................................................................................................ 9
Duct cleaning ................................................................................................................................................... 9
Coils ................................................................................................................................................................ 9
Air conditioning coil ........................................................................................................................................ 9
Fan and motor ................................................................................................................................................ 10
Pump ............................................................................................................................................................. 10
TROUBLESHOOTING .................................................................................................................................. 10
Thermostat Call Error ..................................................................................................................................... 10
Pump does not run.......................................................................................................................................... 10
Pump is noisy at start-up ................................................................................................................................ 10
Water heater T&P is weeping ......................................................................................................................... 10
Insufficient or no heat..................................................................................................................................... 10
Water heater supply temp is unstable .............................................................................................................. 10
REV140818
Page 2
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
Cold water at hot faucet .................................................................................................................................. 10
Fan runs for cooling but not heating ............................................................................................................... 10
Heating during Standby Mode ........................................................................................................................ 10
WARRANTY ...................................................................................................................................................... 11
CHECKLIST FOR THE INSTALLER

A Quick Check List

Are the water connections to the water heater oriented in a way to avoid trapping air in the heating circuit?

Is the purge valve installed on the return line from the air handler upstream from the isolation valve?

Is the air handler hung and isolated to avoid transmitting vibration through framing and duct work?

Are the isolation valves full-port? Restrictive valves will limit performance.

Is outdoor cooling unit contactor wired according to the wiring diagram?

Are Thermostat connections correct, including cooling and continuous run connections? Do they operate their intended
zone?

Have the packing materials been removed from the blower and the pump ?

Is there an installation manual and controls user manual for the home owner ?

Is the unit accessible? Are there clearances for service and component replacement?

Is the return duct/drop acoustically lined ? (at least 6 ft. of the return duct/drop must be lined)

Is the filter cover in place? Is a clean filter in place? Is the supplied filter rack installed?

Has the electronic controller been properly configured as per instructions in the controls user manual?
REV140818
Page 3
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
TYPICAL PLUMBING CONNECTIONS
REV140818
Page 4
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
EQUIPMENT SPECIFICATIONS
Physical Properties
MODEL:
Dimensions (W x D x H) inches
ECRW33
25”x23”x16”
Supply Air Opening (WxD) inches
Adjustable
Return Air Opening (WxD) inches
20”x8”
Filter Rack Size (WxD) inches
16”x20”
Water inlet and outlet
Coil size (length x width x rows)
Shipping weight – pounds
Power (V/Ph/Hz)
½”
13 x 20 x 2
row
60
115/1/60
Total Unit FLA
6.3
Minimum Ampacity
7.7
Max over current (max fuse size) Amps
15
Motor Horsepower
1 /3
PERFORMANCE Specifications
MODEL:
ECR33
Heating Capacity (Btu/h) 100F water
14,000
Heating Capacity (Btu/h) 110F water
18,600
Heating Capacity (Btu/h) 120F water
23,200
Heating Capacity (Btu/h) 130F water
27,900
Heating Capacity (Btu/h) 140F water
33,000
Heating Capacity (Btu/h) 160F water
42,900
Heating Capacity (Btu/h) 180F water
52,700
Cooling Capacity – High (Tons)
2.0
Cooling Capacity – Medium (Tons)
1.5
Cooling Capacity – Low (Tons)
1.0
Continuous run speeds
Low-Med-High
Heating Air flow speeds - cfm
400-600-800
Cooling air flow speeds – cfm
400-600-800
Circulator Pump Flow(GPM)
4.0
Maximum Heating Airflow (CFM)
800
Max. Ext. Static Pressure (in.wc)
1.0
Heating capacities are based on 70F return air, high fan speed. For
medium speed de-rate capacity by 20%. For low speed de-rate capacity
by 40%. Air handler can deliver the programmed airflow at any static
pressure below the maximum external static pressure.
REV140818
Page 5
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
INTRODUCTION
The ECRW series air handler is designed for use
in combination space and water heating systems
(Combo Systems). Combo heating systems use the
home’s water heater to provide both the space heating
and domestic hot water, eliminating the need for a
furnace.
The ECRW has a low profile which makes it ideally
suited for air handler replacements above the newer
taller high efficiency water heaters where space is at a
premium.
Features
The ECRW air handler offers many unique features
that set them apart:
this freeze condition is not normal and may indicate
blocked ducts, dirty filter or an over-sized cooling
unit.
ROTARY SPEED SELECTOR KNOBS
TT CONNECTIONS
The control has a selector knob for each speed:
heating, cooling, continuous run. The knobs are colour
coded and labelled for easy identification. Each mode
speed is independently selectable directly from the
control board.
SOFT START
This feature starts the fan slowly and quietly rather
than a large “thump” common in some furnaces and
air handlers.
EVAPORATOR COIL FREEZE PROTECTION
If the evaporator coil air temperature drops outside of
the expected operating range this indicates a potential
evaporator coil freeze condition. Coil freezing can
lead to slugging (liquid refrigerant going back to the
compressor) which will damage the compressor. All
ECRW series air handlers come equipped with a
sensor which will respond by shutting off the outdoor
cooling unit to allow the system to warm up. Note that
TT connections are provided for the heating contractor
to operate a boiler or external pumps and devices with
any heating call. Refer to the wiring diagram in the
controls user manual for details.
PUMP EXERCISER
The air handler is equipped with a pump exerciser that
brings on the pump for 90 seconds every 24 hours to
flush any water through the system at least once a day.
A test button on the control allows for easy
verification that the pump exerciser is operating
correctly
BUILT IN COOLING COIL
Integral coil sized for maximum two tons of cooling.
STAINLESS STEEL FLOAT SWITCH
Float switch shuts off air conditioning in case of drain
plug to avoid flooding.
PRODUCT DESCRIPTION
CABINET
All cabinets have a tough, durable low maintenance
painted finish.
Cabinet dimensions are designed to provide maximum
installation flexibility. Refer to installation
requirements for more details.
HEATING COILS
All heating coils are potable water grade copper
suitable for use in plumbing systems. No lead solder is
used in any component construction. All coils and
internal piping conform to ASTM B68 or ASTM B88
standards.
High-density aluminum fins provide maximum heat
transfer for small coil surface.
REV140818
Page 6
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
FAN AND MOTOR
CHECK VALVE
All fans are wide body dynamically balanced for extra
quiet operation. Multi-directional sleeve bearing
motors allow mounting in any direction for maximum
installation flexibility.
Air handlers come with built in spring loaded check
valves located in the outlet of the internal pump
Check valves protect against back-flow of water to
avoid short circuiting around the water heater during
domestic water use.
CIRCULATING PUMP
PLUMBING KIT
The circulating pump is matched for maximum
performance. Air handlers come with internally
mounted pumps for ease of installation. Air handlers
can be special ordered with external, field installed
pumps, when it is desirable to locate the circulator
below the air handler, such as in attic installations.
Air Handlers are shipped complete with a full port ball
valve for the supply connection and a full port ball
valve with flush port for the return connection. These
valves are to be installed as close to the heat source as
possible as shown in the plumbing schematic.
THERMOSTAT
ECRW air handlers are supplied with a standard heat /
cool thermostat for installation with the air handler.
EQUIPMENT SIZING AND SELECTION
PROCEDURE
1.
2.
3.
4.
5.
6.
Conduct a complete heat loss / heat gain
calculation.
Determine inlet water temperature
Select Air Handler
Determine zones within the space
Select # outlets per room
Determine Duct Layout
HEAT LOSS / HEAT GAIN
Room by room calculations need to be completed
using HRAI, ASHRAE, or another approved sizing
methods.
AIR HANDLER SELECTION
The selected air handler must be sized according to the
following rules:
a) Heating capacity should be between 100% and
140% of the heat loss.
(110% to 140% for combo systems @ 130F water
temp)
b) Cooling capacity should be between 75-100% of
the heat gain. Do not oversize
When using a boiler system, select a boiler with an
output that meets or exceeds the heat loss of the space
being heated. If the boiler is serving additional loads,
size the boiler to meet the total combined load.
For combo heating systems, use an approved sizing
method such as the Unified Combo Guidelines
published by HRAI.
INSTALLATION
The installer must adhere strictly to all local and
national code requirements pertaining to the
installation of this equipment. Detailed instructions are
shipped with all accessory items and should be
followed closely.
mounting positions. For installations where the access
door faces up or down, select an air handler with an
external pump to avoid the pump being mounted with
its shaft vertical. The pump shaft must be mounted
horizontally to avoid premature failure.
AIR HANDLER MOUNTING
The air handler can be hung by securing straps through
any of the existing screw holes in the cabinet. When
the existing screw is too short for securing a mounting
strap, a longer screw can be used provided care is
The air handler can be installed in any direction. Some
precautions must be observed for some of the possible
REV140818
Page 7
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
taken not to damage any internal components. When
fastening straps using screws other than those supplied
with the cabinet, special care should be taken in the
vicinity of the coil to avoid tube puncture.
The cabinet is designed so that the return air can be
located on either side of the cabinet, through the
bottom of the cabinet, or from the back. Position the
filter rack so that the filter is readily accessible.
Install the air handler with the door firmly screwed in
place to make sure the cabinet remains square.
Provide at least 2 feet (0.75 metres) of service
clearance in front of the access panel of the air
handler. Zero clearance is acceptable on all other
faces.
DUCTWORK
Duct connections at the air handler should be labeled
for future reference (eg. basement, main, upstairs).
Supply trunks may be square or round. SEAL all joints
and seams with metal tape or sealing compound.
Locate outlets at least 6 inches from outside walls or
window coverings.
Ductwork installed in unheated spaces such as attics
must be installed between the insulation and the heated
space. Provide at least R-12 of insulation above ducts.
If cooling is required, the branch and trunk lines must
be insulated and sealed with a vapour barrier prior to
applying house insulation.
RISK OF FREEZING
Steps must be taken to prevent the hot water coil
from freezing. Coils that have failed due to
freezing and damage caused by frozen coils are not
covered under warranty.
If a fresh air duct is required, make connection to
return air plenum at least 18 inches from filter.
Insulate all fresh air ducts.
Fresh air and HRV connections to ductwork can pose
a risk of dumping cold air into ductwork during
periods of stand-by or continuous run. Calculate
mixed air stream temperatures and provide interlock
controls to prevent freezing conditions.
If an HRV is to be attached to the return ductwork, the
HRV must be interlocked to the air handler controls to
ensure the air handler fan is forced to run if the HRV
is in operation. This interlock is require for both
summer and winter operation.
AIR CONDITIONING
The ECRW series air handler is equipped with an
integral coil for cooling. The unit is shipped with a
flow rater piston sized for 1.5 Tons of cooling using
R410a refrigerant. Other piston sizes are available. For
applications where a TX valve is desired, the piston
can be removed and the TX valve piped external to the
unit. To install the TX valve inside the unit A TX
valve kit using Chatteff connections is available for
threading directly into the flow rater body. Make sure
the fan speed is correctly selected for the cooling load
installed. Abnormal conditions such as plugged filter
can pose the risk of freezing. All ECRW series air
handlers include a temperature sensor in the air stream
that will detect a near freezing condition and will
interrupt the air conditioner until it warms up. (Refer
to wiring diagram mounted inside air handler.
ATTIC AND CRAWL SPACES
Air handlers may be located in areas subject to
freezing conditions. It is necessary to protect the hot
water coil from freezing. An optional Freeze
protection remote bulb thermostat wired in parallel to
the room thermostat can be used to cycle on the pump
and blower when conditions get close to freezing. The
Freeze Protection thermostat cannot protect piping that
passes through unconditioned spaces
HRV and Fresh air connections
ELECTRICAL
Warning! - Make sure unit is properly grounded.
Locate air handler on a separate electric circuit.
THERMOSTAT
All air handlers operate on 115VAC/1ph/60hz line
voltage. All control circuits are low voltage, either
24VAC or 0-10VDC.
The ECRW air handlers are supplied with a
standard electronic heat/cool thermostat. ECRW air
handlers are compatible with all thermostats.. If you
REV140818
Page 8
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
encounter older style thermostats that require
significant power to be dissipated, there are large
resistors that can be switched into the circuit to
accommodate these thermostats. See the board wiring
diagram for location of the dip switches. DO NOT turn
on these resistors unless they are required to avoid
wasting electrical power unnecessarily.
The ECRW air handler is compatible with all
standard setback thermostats. Setback thermostats can
be used to achieve greater energy savings.
The ECRW series air handler is compatible with both
heat/cool and heat pump thermosets. A switch is
provided on the control board to toggle between
thermostat types
Thermostat wires are connected to the control using
push button terminal strip inside the air handler
electric box.
HUMIDISTAT
Humidistat connection is provided on the control
board for switching the humidistat on and off with the
heating cycle. Do not connect to the Y terminal to
drive the humidistat 24 volt circuit. See wiring
diagram inside unit for details.
START-UP PROCEDURE
Do not start the air handler or water heater until
ALL air has been purged!
1.
2.
3.
4.
Fill the boiler loop or water heater with water, but
do not start it.
Purge all air from the boiler heating or domestic
water system.
Purge all air from the space-heating loop by
closing the isolation valve on the return leg of the
loop and open the drain to purge air. Open the
return leg isolation valve and then close the drain
valve.
Start the boiler or water heater according to the
manufacturer’s instructions. Set the design water
temperature and wait for the system to shut off.
You can check that the water heater is set properly
during the warm up by running a small amount of
water into a glass in a sink while the water heater
5.
6.
7.
is warming up. Using a thermometer measure the
temperature of the water as soon as the water
heater burner shuts off. If the set-point
temperature is too low or is above 140F/60C, reset
the tank control, run water until the burner starts
again and repeat the measurement.
Turn on the power to the air handler and set up the
air flow desired for heating, cooling and
continuous run speeds. This is important to ensure
that the correct airflows are used for the
equipment as installed.
Set the room thermostat for heat to energize the
fan and pump. If a gurgling sound is present, it
should subside within one minute. If noise is still
present after one minute, repeat step 3 to purge air
as necessary.
Check pipes for heating to make sure there is flow
and feel the pump motor to see if it is running hot.
SERVICE AND MAINTENANCE
FILTER
COILS
All Ecologix air handlers are provided with a pleated
filter media. This filter should be inspected monthly
and replaced as required. Replacement filters are
available from Ecologix.
Air conditioning and heating coils should not require
cleaning if the filter maintenance schedule is adhered
to. If a filter is damaged or collapses from plugging,
dust may foul the coils. If this happens, replace the
filter and carefully vacuum the heating coil. The fan
may need to be removed to gain access to the face of
the heating coil.
DUCT CLEANING
If proper filter maintenance is adhered to, duct
cleaning will not be required for the life of the
equipment.
AIR CONDITIONING COIL
At the start of each cooling season, check the drain
connection to the cooling coil to ensure it is free of
REV140818
Page 9
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
debris. If a plugged air conditioning coil is suspected,
call a service technician for testing and cleaning
FAN AND MOTOR
Check fan for dust once a year. If dirty, vacuum to
remove dust. Keeping the fan blades clean will reduce
noise and improve the capacity and efficiency of the
heating system
PUMP
The circulating pump is water lubricated and should
require no regular maintenance. .
TROUBLESHOOTING
THERMOSTAT CALL ERROR
INSUFFICIENT OR NO HEAT
If the air handler does not run when thermostat is
calling, check the status lights to see if the call is being
seen by the control and check the error lights to see if
there is a thermostat error. Thermostat error occurs
when a heating and cooling call are simultaneously
being received by the control. Note that some
thermostats have a delay (typically five minutes)
before they will start the air handler in cooling the first
time.





PUMP DOES NOT RUN
In areas where hard water is present the pump may
“stick” and fail to run. Often, closing the isolation
valve on the return leg and opening the drain port so
that water flows through the pump can free this. If this
fails to free the pump, removal for cleaning or
replacement is necessary. The daily pump exerciser
will help prevent pump sticking
PUMP IS NOISY AT START-UP
Air is present in heating loop. If sound has not
diminished within 1 minute, purge air in accordance
with the Start-Up procedures. If heat source is a water
heater, check to make sure branch connections for
heating loop are horizontal to prevent the collecting of
air in the heating loop. See the drawing: Typical
Plumbing Connections at the front of this manual.
WATER HEATER T&P IS WEEPING
A check valve or back-flow preventer may have been
installed in the system. Some form of pressure relief
may be required. Options are:
 Install expansion tank
 Install pressure relief valve; locate outlet over
laundry tub or floor drain.
 Install combination toilet tank/pressure relief
valve
REV140818

Plugged air filter or coil. Refer to
Maintenance section for filter care and coil
cleaning.
Air in heating loop; purge system.
Inlet and outlet connections to air handler
backwards; reverse connections.
Water heater supply tube (dip tube) is
restricted or damaged; check and/or replace.
Supply water temperature set too low or not
calibrated properly; check water temperature.
Restrictions in heating loop; remove
restrictions, check if valve is stuck, isolation
valves could be too restrictive or left partially
closed after purging, or closed valve.
WATER HEATER SUPPLY TEMP IS UNSTABLE
Check water heater setting and temperature sensors for
good contact on coil headers.
COLD WATER AT HOT FAUCET
When heat source is a water heater, the most probable
cause is reverse flow through the heating loop from a
stuck check valve; repair or replace valve.
FAN RUNS FOR COOLING BUT NOT HEATING
Room thermostat may be connected improperly. Refer
to Electrical section or wiring schematic on air handler
for proper installation.
HEATING DURING STANDBY MODE
Probable cause is thermal siphoning. Make sure piping
elevation instructions shown in piping drawings have
been followed. Repair or replace check valve. Check
elevation of air handler above water heater to see if
motorized valve required for positive shut-off.
Page 10
ECRW-Install
ECRW
TM
Series Air Handler Installation Instructions
Warranty
This product is warranted by Ecologix Heating Technologies Inc to be free from defects in materials and workmanship that
affect product performance under normal use and maintenance within the applicable periods specified below. Replacements
furnished will carry only the un-expired portion of the original warranty.
Two-Year Parts
Ecologix Heating Technologies Inc will provide replacement parts for ANY part that fail within two years of purchase,
subject to the terms below.
Five-Year Parts
Ecologix Heating Technologies Inc will provide replacement parts for any heating coils, cooling coils, cabinetry and piping
that fail within five years of purchase, subject to the terms below.
Terms
 Reasonable proof of original purchase date must be provided in order to establish the effective date of the warranty,
failing which, the effective date will be based on the date of manufacture plus thirty days.
The warranty does not cover failure or damages caused by:
 improper installation or operation
 accident, abuse or alteration
 operation of device at temperatures or pressures outside of the rated capacities
 lime or scale deposits
 corrosive operating environment
 equipment moved from original installation location
 Replacements furnished under this warranty will be F.O.B. Ecologix Heating Technologies Inc product distribution
points in the United States and Canada. They will be invoiced at regular prices. The account will be credited the full
amount when the defective part is received by Ecologix, examined and approved as a valid warranty.
 Warranty applies to the original purchaser, but may be transferred to another owner provided the equipment is not moved
from the original installation site.
 This warranty does not apply to labour, freight or any other cost associated with the service repair or operation of the
product.
 Ecologix shall not be liable for any direct, special, incidental or consequential damages caused by the use, misuse, or
inability to use this product.
 Ecologix is under no legal obligations to rectify, including but not limited to, lost profits, downtime, good will, damages
to, or replacement of equipment and property
 Purchaser assumes all risk and liability of loss, damage or injury to purchaser and purchaser’s property and to others and
their property arising out of the use, misuse or inability to use this product.
REV140818
Page 11
ECRW-Install
Download PDF