A.O. Smith BTH 300A Manuale Utente

16

4.

When the system requires water for space heating at
temperatures higher than required for domestic water purposes,
a tempering valve must be installed.  Please refer to installation
diagrams on pages 23 through 28 in back of manual for
suggested piping arrangements.

IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE
APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED
WITH 105°C OR ITS EQUIVALENT, EXCEPT IN THE BURNER
HOUSING. IN THIS CASE USE 200°C WIRE.

THE COMPUTER CONTROL REQUIRES A SOURCE OF
STABLE CLEAN ELECTRICITY FOR PROPER OPERATION.
INSTALLING THE HEATER ON A BRANCH CIRCUIT THAT
HAS ELECTRONIC NOISE, IS SUBJECT TO FLUCTUATIONS
I N   V O LTA G E   L E V E L  O R   H A S  A N  A P P L I A N C E   W H I C H
GENERATES EMF OF RFI INTERFERENCE CAN CAUSE
THE CONTROLLER TO MALFUNCTION. A HIGH QUALITY
POWER CONDITIONER MUST BE INSTALLED IF THE
ABOVE CONDITIONS EXIST. MALFUNCTIONS CAUSED BY

A POOR ELECTRICAL SUPPLY ARE NOT COVERED UNDER
YOUR WARRANTY.

The controller is wired to the heater as shown in figures 15 & 16.
The model and rating plate provides the electrical information needed
to size the complete heater branch supply.

All electrical work must be installed in accordance with the National
Electrical Code, NFPA 70 or the Canadian Electrical Code, CSA
C22.1 and local requirements.

When installed, the appliance must be electrically grounded in
accordance with local codes or, in the absence of local codes, with
the  National Electrical Code, ANSI/NFPA 70 or the Canadian
Electrical Code, CSA C22.1.

DO NOT ENERGIZE THE BRANCH CIRCUIT BEFORE THE
HEATER TANK IS FILLED WITH WATER.

NOTE:  This controller is Polarity Sensitive. If the Hot and Neutral
Supply Voltage is reversed, the controller will not sense flame. Verify
polarity before connecting the unit.