Engineered Comfort Fan Coil Controller EZstat Especificaciones descargar pdf (Pagina 12)

D12

9-10-07

FAN COIL UNIT PIPING PACKAGES

GENERAL NOTES:

1. Nailor only recommends chilled water valve control for Nailor

Digital and Analog VAV control sequences where a constant

discharge temperature is maintained and humidity is therefore

controlled. Modulating cooling valve control with fixed fan

speed electric controls can increase relative humidity in the

space at part load conditions. Modulating heat valve control

may result in low leaving air temperatures while the valves

reduce flow as setpoint is approached. Nailor does not

recommend their use with standard controls for either

application.

2. All 39 Series Hi-Rise Units include two flexible stainless steel

briefed hoses and full port ball isolation valves per coil. This

hose/valve combination provides a “union” type connection to

allow coil removal. Hi-Rise Units require a Nailor supplied

piping package which is factory assembled, installed and

wired.

3. 35F and 37F Horizontal Units with Nailor Digital and Analog

VAV Controls require a Nailor supplied piping package. This

package (less optional ball valve) is factory assembled,

installed and wired in a full protective enclosure with access

door. Ball valves when selected as part of the package ship

loose for field connection.

4. All standard piping packages and components described in

this catalog are for chilled and hot water applications. They

may be also used with up to 50% ethylene and propylene

glycol solutions.

5. Control valve actuators are removable and may be serviced or

replaced without removal of the valve body. All control valves

are piped on the return side of the coil (3-way control valves

are mixing).

6. 2-position (spring return) chilled and hot water valve / actuators

are piped normally closed to the coil as standard. For hot water

coils, control valves are available normally open as an option.

This must be stated clearly on schedule/order.

7. All ball isolation valves on the return line are furnished with an

adjustable memory stop feature (when no other flow control

device is selected) and may be used as a balancing valve.

8. Pressure/Temperature (P/T) ports when selected are supplied

on the ball valves as standard. If it is required that P/T ports be

located to monitor the pressure and temperature directly

across the coil only, select PTO (other location) option.

9. Automatic fixed flow controls (FC, FCC) are available in the

following flow (GPM) ratings. Individual coil GPM requirements

must be specified on schedule/order.

1/2" (13) valve: 0.5 to 4.0 GPM in 0.5 GPM increments. 5 to 9

GPM in 1 GPM increments.

3/4" (19) valve: 3.0 to 4.0 GPM in 0.5 GPM increments. 5 to 12

GPM in 1 GPM increments.

10.

2-pipe system cooling and heating auto changeover systems

using a 2-way control valve include a 1/4" (6.3) bleed line to

assure proper changeover thermostat (Aquastat) operation.

11. The valve package piping and component details in the catalog

are for standard valves and components. Performance ratings

such as Cv, max. close-off pressure, operating temperature

and pressure are shown in component specifications.

Suitability for use must be based on individual application

requirements determined by others. Nailor assumes no

responsibility for selection and/or application of valve package

and components.

Basic System Types and Application:

All types may use a 2-way or 3-way motorized control

valve

2-Pipe System (One Valve Package)

A) Hydronic Cooling Only

B) Hydronic Heating Only

C) Hydronic Cooling and Heating (Aquastat required)

D) Hydronic Cooling with Total Electric Heat

E) Hydronic Cooling and Heating with Auxiliary Electric

Heat (Aquastat required)

4-Pipe System (Two Valve Packages)

A) Hydronic Cooling and Heating

Legend:

BV Ball Valves (2). Memory stop where required.

BVPT Ball Valves (2) with Pressure/Temperature (P/T)

Port. Memory stop where required.

FC Fixed Flow Control

FCC Fixed Cartridge Flow Control

AFS Adjustable Flow Circuit Setter

YS Y Strainer

YSB Y Strainer w/hose bib valve

PTO P/T Ports (other location)

BPV Bypass Balancing Valve

COIL

LL G

SET

E V

IT SE

COIL

2-WAY MOTORIZED

CONTROL VALVE

3-WAY MOTORIZED

CONTROL VALVE

BALL VALVE (BV)

BALL VALVE WITH

P/T PORT (BVPT)

Y-STRAINER (YS)

ADJUSTABLE FLOW

CIRCUIT SETTER (AFS)

FLEX HOSE

UNION (UN)

AQUASTAT

BYPASS

BALANCING

VALVE

FIXED FLOW

CONTROL (FC)

Y-STRAINER WITH

HOSE BIB (YSB)

FLOW

1/2" 2511 GPM

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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Engineered Comfort Fan Coil Controller EZstat Especificaciones Pagina 12

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