ideal commercial VICEROY GTS 8, Установка и обслуживание

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10
Viceroy GTS -
Installation & Servicing
GENERAL
8 SYSTEM DESIGN
Minimum Water Flow
Design Flow Rates
The following table gives the flow rate required for each boiler
based on a design temperature difference of 11ºC (20ºF)
at the maximum rated output. For hydraulic resistance see
Performance Data table (page 2).
Minimum Flow Rates
It may be necessary to fit a shunt pump to ensure minimum
flow rates.
System Design
Recommendations relating to water system design are
contained in BS. 5410: Part 2 and BS. 6880.
System design must allow for adequate internal circulation
within the boiler and sufficient heat release from the boiler body
during and immediately after burner firing. Heating and/or hot
water controls should be interlocked electrically with the burner,
to prevent firing when the system does not demand heat.
Depending on system design it may be necessary to interrupt
electrical supply to the burner before any mixing valves are
completely closed to the boiler flow. This will dissipate residual
heat. Also a pump overrun of at least 5 minutes is required on
plant shutdown to avoid interference trip out of the overheat
thermostat. If system return temperature remains below
30ºC for most of the heating period some protection from
condensation is required.
Please contact
Ideal Boilers for further information.
Example of Installation
The example below does not cover all the possible cases of use.
It is only aimed at drawing attention to the basic rules which
must be complied with. In all events, comply with applicable
codes of practice and national or local regulations.
Example shows a sealed system with domestic hot water
production via independent calorifiers.
Typical Sealed System Example
A shunt pump sized on the minimum flow rate required MUST
be fitted. Provided adequate heat dissipation can be achieved
at all times the shunt and DHW primary pumps only may run
on during the overrun period allowing the heating pump to be
switched off. This example assumes the DHW primary pump
flow rate required is less than that required for the shunt pump.
Boiler Size GTS 8 GTS 9 GTS 10 GTS 11 GTS 12 GTS 13 GTS 14
Normal water flow rate l/s 8.47 9.77 11.73 13.03 14.55 15.63 16.94
temperature difference 11ºC (20ºF) g.p.m. 111.77 128.96 154.75 171.95 192.01 206.34 223.53
Minimum water flow rate l/s 2.66 3.07 3.69 4.09 4.57 4.91 5.32
temperature difference 35ºC (63ºF) g.p.m. 35.13 40.53 48.64 54.04 60.35 64.85 70.25