NTI T 151-200 Series User manual

5
Installation Instructions 85022/85023/85024/85025/85026 Heat Exchanger
ASME Revision Date: 21-08-2014
1
NY Thermal Inc.
Tel: [phone]
Toll Free: 1-800-688-2575
Fax: [phone]
Web: www.nythermal.com
Email: [e-mail]
85022 / 85023 / 85024 / 85025 / 85026/85760/85761
Tx151-200 Heat Exchanger Assembly, ASME
Post Serial # 72000
c/w Burner Door and Flue Box
This boiler must be service by a qualified heating technician. Failure to properly
maintain or service this appliance may result in property damage, serious injury to
occupants or, death.
The installation of this kit must be performed by a qualified boiler technician.
Installing this kit without the proper background and training is hazardous and may
result in property damage or death.
Applicable Boiler Models
Tx51-200
Tx151C
Tx200C
Kit Contents
85022 Heat Exchanger Assembly Tx51 OR
85023 Heat Exchanger Assembly Tx81 OR
85024/85760 Heat Exchanger Assembly Tx101 OR
85025/85761 Heat Exchanger Assembly Tx151, Tx151C
OR
85026 Heat exchanger Assembly Tx200, Tx200C
Installation Instructions
Tools Required
Needle Nose Pliers
Phillips #2 screwdriver
Flat Screwdriver
¼” nut driver or wrench
5/16” nut driver or wrench
10mm wrench
3/8” Wrench
Pipe wrench
Combustion Analyzer
Saw to remove venting
Adjustable wrench
Vacuum Cleaner
Heat Exchanger
Disassembly Instructions
Turn off power and gas to the boiler.
Drain the boiler: use a wet/dry vacuum to help remove excess water.
Remove the exhaust venting.

5
Installation Instructions 85022/85023/85024/85025/85026 Heat Exchanger
ASME Revision Date: 21-08-2014
2
Remove the gas line from the gas valve.
Remove the vinyl hose from the gas
valve.
Remove the air intake from the gas valve
Venturi by loosening the MJ coupling.
Disconnect the flame probe and ignition
electrode cables.
Disconnect the wire harnesses from the
gas valve, stack sensor, thermal fuse, and
blower motor.
Remove the stack sensor by pressing and
turning it counter-clockwise. Install it in
the new heat exchanger
Make sure the O-
ring remains with
the stack sensor.
MJ Coupling
Stack
Sensor

5
Installation Instructions 85022/85023/85024/85025/85026 Heat Exchanger
ASME Revision Date: 21-08-2014
3
Remove the auto-air vent clip and lift the
auto-air vent assembly up to remove it
from the heat exchanger.
Prior to installing the air vent in the new
heat exchanger remove the shipping plug
and O-ring. Use the new O-ring from the
shipping plug during reassembly.
When reinstalling
the air vent ensure
the new O-ring is in place before
inserting the air vent in new heat
exchanger.
Remove the flue adapter from the top of the
boiler.
Remove the condensate drain from the
bottom of the heat exchanger.
3
Air Vent Clip
Auto Air Vent
O-Ring from
Shipping Plug
Shipping Plug
Location

5
Installation Instructions 85022/85023/85024/85025/85026 Heat Exchanger
ASME Revision Date: 21-08-2014
4
Combi Models Tx151C and Tx200C:
Remove the white plastic retaining clips
from the copper pipes by rotating the clips
counter-clockwise to unlock them.
Remove the pipes from the combi block
by pulling them away from the combi
block.
When reinstalling
the plastic clips
ensure they are oriented as shown when
locked.
It is not necessary
to remove the field
water connections from the bottom of the
combi boiler.
Tx51 - 200:
Remove the water connections from under
the boiler and then remove the boiler supply
and return pipes.

5
Installation Instructions 85022/85023/85024/85025/85026 Heat Exchanger
ASME Revision Date: 21-08-2014
5
Remove the heat exchanger hold down
brackets.
Remove the heat exchanger, blower motor,
and gas valve as an assembly.
Transfer the blower motor and gas valve to
the new heat exchanger prior to installing
the new heat exchanger.
Reassemble in reverse order.
Operate the boiler at high fire and perform a combustion analysis according to the guidelines in the
installation and operation manual.
Explosion Hazard –Failure to properly install the combustion blower gasket may result
in gas leakage causing serious injury or death.
Combustion analysis –Failure to perform a combustion analysis and adjust the gas
valve according to the installation and operation manual will result in boiler malfunction
and or excess carbon monoxide production which could result in serious injury or death.
Gas Leakage - Failure to properly reconnect the gas line and check for leaks may result
in gas leakage causing serious injury or death.
Flue Gas Leakage -Failure to properly attach the venting or condensate drain and check
for leaks may cause flue gas leakage causing serious injury or death.
Water Leakage - Failure to correctly reattach and seal the boiler piping will result in
water leakage causing property damage.