Eco-King HWB-299, Инструкция по установке и обслуживанию

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E93.1801EN171 HWB installation manual 101
19 ADJUSTING AND SETTING THE WATER HEATER
Before carrying out any adjusting of the burner, carefully read this complete chapter.
The initial lighting of the appliance must be performed by a licensed Gas Technician. Failure
to follow these instructions may result in property damage, serious injury or death.
As soon as the appliance has been fully installed (with regard to hydraulics,
filling and de-
aeration
of installation, gas, flue gas, air intake, wiring etc.) according to the preliminary in-
stallation instructions, the water heater may then be wired to an electrically grounded power
supply source. The water heater should always be connected to a disconnect or external
power shutoff. The water heater must be electrically bonded to the ground in accordance with
the requirements of the local authority having jurisdiction or, in the absence of such require-
ments, the National Electrical Code, ANSI/NFPA 70, and or/the Canadian Electrical Code Part
I, CSA C22.1 Electrical Code.
Introduction
The water heater must always be adjusted in the next situations:
- A new water heater is installed
- As part of a service/maintenance check, in case the CO
2
values turns out to be incorrect .
- The gas valve has been (re)placed .
- Gas conversion to propane. Prior to adjustments, follow the procedure in 18.5
- The venturi has been replaced. Prior to adjustments, follow the procedure in 18.4
- The fan has been replaced
- The flue gas check valve has been replaced
In any of the cases described, always check the gas/air ratio of the combustion figure (CO
2
) at maximum and
minimum input. First set the water heater at maximum load and subsequently at minimum load and repeat if nec-
essary (adjustments at maximum load influence values at minimum load and vice versa).
Chapter overview:
First, all necessary values are given in adjustment table in § 18.1.1. A drawing of the gas valve(s) and setting
screws is given in § 18.1.2. In § 18.2 a general procedure, conform which the adjustments must be carried out, is
presented. § 18.3 describes the specific adjustments to be made when the venturi is replaced, and § 18.4 de-
scribes the changes needed when the gas type is set to propane.
19.1.1 C
OMBUSTION TABLE
Table: CO
2
values for maximum and minimum load.
1)
gas type water heater type CO
2
/ O
2
[%] CO
2
/ O
2
[%]
High Fire Low Fire
natural gas HWB-299, HWB-399, HWB-499
9.2 / 4.7 9.8 / 3.7
propane
2)3)
HWB-299, HWB-399, HWB-499
10.4 / 5.0 11.0 / 4.1
1) All values measured without front door.
2) For propane: a conversion kit (orifice) has to be mounted, see 18.4.
3) For propane: appliance type must be changed, see 18.4
WARNING