ECR International Utica Boilers UB90-50 Installation, Operation & Maintenance Manual page 44

Figure 25 - Manifold Pressure Measurement Detail
Following steps and diagram indicate location of the
connection points required to measure manifold pressure.
Manifold pressure may be measured using a U-Tube
Manometer or Differential Pressure Gauge. Diagram shows
connection of both measuring devices. Only ONE DEVICE IS
REQUIRED to measure manifold pressure.
Remove plug. Install appropriate barbed fitting and connect
pressure side line from U-Tube Manometer or Differential
Pressure Gauge.
Figure 26 - Gas Valve
PRESSURE REGULATOR
ADJUSTMENT (UNDER CAP SCREW)
INLET
PRESSURE
TAP
INLET
GAS CONTROL KNOB
VERIFICATION PROCEDURE AND ADJUSTMENT
WIRING TERMINALS (2)
VR8205
ON
OFF
Refer to "Differential Air Pressure Switch Check - all
models" on page 45 when reading manifold pressure.
When measurement is complete, disconnect U-Tube
Manometer or Differential Pressure Gauge. Be sure to
reinstall ⅛" plug, using appropriate pipe thread sealant
approved for use with natural and liquefied Petroleum
gases.
Regulator cover screw must be installed at all times
OUTLET
unless adjusting manifold pressure. Firing rate and
PRESSURE
manifold pressure must only be measured with
TAP
cover screw firmly installed.
OUTLET
44
NOTICE
P/N 240010135 Rev. D [04/15/2017]