Diagram 1. Process
Text found in the image above.
- MOD Valve Manifold Assembly & Pressure Adjustment
- Manifold Pipe
Shortened horizontal leg. - Maxitrol Mod Valve - EXA52
(Never fully closes - not a shutoff valve)
Almost 1' pressure drop through Mod Valve at full rate - Adjust Manifold Pressure Here on Gas Valved BUT Read Pressure from side of MOD Valve
- Manifold Pressure
Hi = 3.5" wc (with 10 VDC signal voltage)
Lo = 0.7" wc (Lo is 40% of Full rate - taken at 2 VDC or less signal voltage) - Gas Valve - Single Stage High Capacity - 3/4" pipe - On/Off Safety Valve
(Outlet Pressure set at 4.5" wc) - Tap Location to obtain Manifold Pressure for MOD Gas Units
- 4.5" wc "in between" pressure
- Flow (pointing to the left)
- 7" wc inlet
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.