Nortec EL SERIES, Инструкция по установке, эксплуатации и обслуживанию

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Installation
2584597_B_EN_1705 Nortec EL/RS Outdoor
5.2.2 Rooftop Curb
Figure 6:
OFF
ON
1
2
3
4
5
6
10
7
11
12
14
13
8
9
Typical Installation on Rooftop Curb (medium size unit shown)
1 Steam line, must maintain a constant minimum upslope of 10° or downslope of 2°, and must be insulated
2 External fused disconnect switch (supplied by others)
3 Curb. See Note 1 below.
4 Pipe chase (drain lines). See Note 2 below.
5 Drain line (freeze protection valve), 3/8 in (9.5 mm) I.D. See Note 3 below.
6 Drain line (main) – 1-3/16 in (30 mm) I.D. See Note 3 below.
7 Air gap funnel. See Note 4 below.
8 Filter, 5 μm (optional, but recommended)
9 Shutoff valve (supplied by others)
10 Union fitting (supplied by others)
11 3-way normally-closed valve, or normally-open and normally-closed valves (supplied by others). See Note 5 below.
12 Pipe chase (water supply line)
13 Water supply line, minimum 1/2 in (13 mm). See Note 6 below.
14 Pipe chase (steam line)
Note 1: The curb must be capable of supporting the entire weight of the unit when it is in operation –
refer to
Table 9 on page 57
. The curb must be properly anchored to the rooftop.
Note 2: Route all drain lines through a pipe chase. Seal the pipe chase to prevent rising steam from
entering the bottom of the unit, and to isolate the unit from the pressure inside the building.
Note 3: In cold climates all drain lines must be properly trace heated and insulated to prevent freezing.