Paloma PH2-20R DVSN, Engineering Handbook, Page: 19 / 172

SVC 820-Tankless Gas Trouble Shooting Manual Page | 19
19
CONTROL BOARD
DIP #1 – Adjust max temperature; EZ Link cable
DIP #2 – Adjust for altitude differential
MIN & MAX (SW1 & SW2) – Adjust water
temperature setting; gas pressure; etc.
ADJ (SW3) – Adjust gas pressure etc.
M – Flame Rod for all models (detects flame)
T – Flame Rod for indoor models only (monitors
combustion efficiency)
F – Communication port (manifold installations)
A – Fuel type and temperature Program Chip
U – Over Heat Limiter (OHL)
R – Thermistors (Ambient, Inlet, Outlet, Heat
Exchanger) & Modulating Gas Valve (PFGR)
S – Water Flow Sensor
C – Water Control Valve
B – Water Bypass Valve
V – Remote Control (Main Bath)
G – Blower Motor
K – Gas Control Valve
H – Igniter Rod