Read carefully the below instructions prior to the installation of the heater!
Data sheet pursuant to Directive No 442/2004 Coll. and Annex No 7
Heater types
OKCE 160 NTR/2,2 kW
OKCE 200 NTR (NTRR)/2,2 kW
OKCE 250 NTR (NTRR)/2,2 kW
OKCE 300 NTR (NTRR)/2,2 kW
OKCE 300 NTR (NTRR)/3-6 kW
Dear Customer,
The Works Cooperative of Dražice - Machine Plant, Ltd., would like to thank you for your decision to use a
product of our brand.
With this guide, we will introduce you to the use, construction, maintenance and other information on indirect
water heaters. Product's reliability and safety is proven by tests implemented by the Engineering Test Institute in
Brno.
The manufacturer reserves the right for engineering modification of the product.
The product is designed for permanent contact with drinkable water.
Guide Contents
1.
USE ................................................................................................................................................................................ 2
2.
PRODUCT DESCRIPTION ............................................................................................................................................ 3
3.
IMPORTANT NOTICES ................................................................................................................................................ 3
4.
5.
TECHNICAL PARAMETERS ....................................................................................................................................... 4
6.
7.
TECHNICAL DATA CHART ........................................................................................................................................ 8
8.
PRESSURE LOSSES ...................................................................................................................................................... 9
9.
10.
ELECTRIC WIRING .................................................................................................................................................... 10
11.
SECURITY EQUIPMENT............................................................................................................................................ 12
12.
SPARE PARTS ............................................................................................................................................................. 13
13.
14.
INSTALLATION REGULATIONS .............................................................................................................................. 13
1. USE
Thanks to their construction and number of variants, the OKC 160 - 300 series water heaters enable economic
preparation of hot service water (HSW) by means of various power sources. Their nominal performance provides
sufficient amount of hot water for flat units, premises, restaurants, and similar establishments. For HSW reheat,
electricity, various types of central heating boilers, recoverable energy sources (heat pumps, solar collectors) and
combination of those can be chosen.
Service water heating via thermal energy through heat exchanger
Closing valves of the heat exchanger must be opened which ensures heating water flow from the hot water heating
system. Together with a closing valve, it is recommended to install an air outlet valve at the inlet to the heat
exchanger in order to bleed the heat exchanger as needed, in particular before the beginning of the heating season.
The time of heating using the heat exchanger depends on the temperature and flow of water in the hot water heating
system.
Energy
Heat losses
efficiency
((Wh/24hr)/l)
class
2
Time of
consumption for
Nominal
content
heating of volume
capacity (l)
heating
from 15°C to 65°C
(hours)
160
4,5
200
5,5
250
6,8
300
8,5
300
3-4,5-6
Electricity
Heat losses
((kWh/24hr)
(in kWh)
9,5
12
15
17,6
17,6
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