NTI GB-ND 057-DO Replacement Instructions

Replacement Instructions
NY Thermal Inc.
Tel: (506) 657-6000
Toll Free: 1-800-688-2575
Fax: 1-506-432-1135
Web: www.nythermal.com
Email: info@nythermal.com

Applicable Boiler Models:


Lx 500

Kit Contains:


Valve GB-ND 057

Tools Required:


Pipe Wrench (for gas line)

Adjustable Wrench (for gas line union)

1/4" and 5/16" Nut Driver

Phillips #2 and #1 Screwdriver

Torx T20 Screwdriver

Torx T25 Screwdriver

Needle Nose Pliers (for gas valve vent adapter)

Combustion Analyzer
Replacement Instructions:

Shut off the gas and power to the boiler.

Remove display and display housing as an assembly (Fig. 1-2 and 1-3). Remove the boiler jacket top
(front and rear) and right side. Loosen the left side panel.

Remove the gas valve harness and the vinyl hose from the gas valve.

Remove the screws securing the gas line adapter to the gas valve inside boiler (Refer to Fig. 1-5).

Remove the screws securing the gas valve to the bracket on the left side of boiler (Refer to Fig. 1-4) and
remove gas valve.

Lift the gas valve up from between the gas valve adaptor and the bracket.

Reinstall the new valve in the reverse order it was removed and perform a combustion test. Refer to Gas
Valve and Burner Setup section in the boiler installation and operation manual included with the boiler.
Fig. 1-2 Display and display housing assembly.
S:\NTI2001_N_Drive (1-20-09)\R&D\PARTS - ENGINEERING\Parts Department Stickers and Instructions\Current Parts Instructions (doc)\84318 Gas
Valve Replacement Instructions Lx 500.docx
84318
Gas Valve GB-ND 057-DO
Fig. 1-1 Gas Valve GB-ND 057
Fig. 1-3 Display housing
84318 │ Gas Valve GB-ND 057
Revision Date: 2016/02/16