Bradford White LAARS OmniTherm ONH1250, Инструкция по установке и эксплуатации

Страница: 34 / 132

Page 34
LAARS Heating Systems
SECTION 6
Condensate Drain Trap
This appliance creates condensation at some operating
conditions as a by-product of cold water supply
conditions. The condensate must be drained from unit.
A combination condensate drain/trap is included on
the unit. See Figure 11 This is used to drain the
condensate from the heat exchanger of the unit. This
condensate drain trap must be installed to prevent the
accumulation of condensate. Connect a ¾” PVC pipe
between the drain connection and a floor drain. The
PVC pipe must continuously slope downward toward
the drain, with no spiraling. If there is no accessible
floor drain, or if the drain pipe cannot be installed with
the proper slope, a condensate pump will be needed to
ensure that condensate is removed.
Consult local codes for direction on disposal of
condensate. In some cases (code requirements or drain
material), condensate will need to be neutralized. A
condensate neutralizer is not included with the unit, but
is available from Laars as an accessory. If a neutralizer
is required, it is helpful to install the boiler or water heater
on a raised 4” (minimum) concrete platform. This will
generally allow sufficient elevation for the condensate
neutralizer to be installed below the condensate trap.
See Figure 11.
If the unit is installed outdoors in a location that may
experience freezing temperatures, precautions must be
taken to prevent condensate from freezing. Damage due
to freezing condensate is not covered by the warranty.
Figure 11. Raised Concrete Platform. 4" Min
Neutralizer kit is
not included.
CAUTION
Condensate is mildly acidic (pH
=
5) and may harm
some floor drains and/or pipes, particularly those
that are metal. Ensure that the drain, drainpipe,
and anything that will come in contact with the
condensate can withstand the acidity, or neutralize
the condensate before disposal.
Damage caused
by failure to install a neutralizer kit or to
adequately treat condensate will not be the
manufacturer’s responsibility.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after operation servicing.
ATTENTION
Au moment de l’entretien des commandes, étiquetez
tous les fils avant de les débrancher. Les erreurs de
câblage peuvent nuire au bon fonctionnement et être
dangereuses. S’assurer que l’appareil fonctionne
adéquatement une fois l’entretien terminé.
WARNING
The unit must be electrically grounded in accordance with
the requirements of the authority having jurisdiction or, in
the absence of such requirements, with the latest edition
of the National Electrical Code, ANSI/NFPA 70, in the
U.S. and with the latest edition of CSA C22.1 Canadian
Electrical Code, Part 1, in Canada. Do not rely on the gas
or water piping to ground the metal parts of the unit. Plastic
pipe or dielectric unions may isolate the unit electrically.
Service and maintenance personnel, who work on or
around the unit, may be standing on wet floors and could
be electrocuted by an ungrounded unit. Electrocution can
result in severe injury or death.
Single pole switches, including those of safety controls and
protective devices, must not be wired in a grounded line.
All electrical connections are made on the terminal blocks
that are located inside the control panel.
All internal electrical components have been prewired. No
attempt should be made to connect electrical wires to any
other location except the terminal blocks.
SECTION 7 Electrical Connections
7.A Installation Warnings
CAUTION
The supply voltage to this unit must not be
disconnected, except for service or isolation, or unless
otherwise instructed by procedures outlined in this
manual. To signal a call for heat, use the heat demand
inputs, as shown in the wiring diagram.
DO NOT MAKE AND BREAK THE LINE VOLTAGE
TO THE UNIT TO SIGNAL A CALL FOR HEAT. A
call for heat/end call for heat MUST be connected to
the heat demand terminals. Some components are
designed to have constant voltage during normal
operation. If the units supply voltage is toggled as
a call for heat signal, premature failure of these
components may result.