香港天花式抽濕機之完整安裝流程。 Installing a ceiling dehumidifier in Hong Kong.

第一階段:現場勘察

於正式報價前,本公司工程師將親赴現場掀起一片假天花,實地量度以下四項關鍵數據:

• 假天花淨空高度 — UTC 系列需 245 mm,GEC V 系列需 280 mm 或以上,商用 GEC 系列則需更深之吊頂空間
• 結構樓板之確切位置,以確認其足以承載 28 至 70 公斤之懸吊重量
• 冷凝水排放終點 — 浴室地台排水口、現有冷氣機冷凝水管,或廚房之地台排水口
• 220 V 電源走線之距離,以及總配電箱是否預留 16 A 獨立迴路

於香港舊式樓宇之施工,最常見之疏漏在於:建築圖紙所示之假天花淨空為 300 mm,惟現場因消防噴淋管及既有冷氣冷媒管已佔用部份空間,實際可用淨空僅餘 220 mm。遇此情況,本公司會將原訂之 UTC68 改用機身較薄之 UTC20,或另尋合適之安裝位置。

第二階段:吊裝固定及減震處理

應採用 M8 或 M10 規格之螺紋鋼吊桿懸掛機身,並將吊桿錨固於結構樓板或鋼骨主架,切勿懸吊於假天花之輕質骨架。於吊桿與機身之連接位置,須加裝橡膠或彈簧式減震墊 — 壓縮機每日連續運轉長達 18 小時,若機身與結構硬性接觸,其運轉聲響將透過樓板結構直接傳遞至下層住戶。

機身左右兩側須預留 50 至 100 mm 之維修空間,以便日後拆卸濾網進行清潔保養。香港之假天花一般採用鋁框扣件結構,安裝時務必預留一個可拆卸式檢修口,並使其正對機身濾網位置。

第三階段:冷凝水排放

所有單相天花式機型(UTC 全系列、GEC V 全系列、GEC68LD-HP、GEC145LD-HP)均標配 1.8 米揚程之內置水泵,隨附之排水軟管內已內置單向止逆閥,防倒流功能由機身原廠處理。正確走線方式為:排水管由機身輸出口起向上垂直延伸至高點(可達 1.8 米揚程上限),再以重力下降至排放終點 — 充分運用水泵之提升能力,並由重力承擔餘下之輸送距離。

三相機型(GEC280LD、GEC400LD、GEC550LD)並無內置水泵,以純重力排放。排水管自機身起須持續向下傾斜至排放終點,中間不可有任何向上提升之段落。

詳細之走線方法、調試程序及常見失誤,請參閱本公司之冷凝水排放指南。

第四階段:電力配置

UTC 系列及小型 GEC V 機型採用 220 V 單相 50 Hz 供電,須配置獨立 16 A 迴路。GEC280 以上之大型機型則需要 380 V 三相電源,香港住宅單位須向中華電力或港燈申請接駁。應於總配電箱前安裝可見式隔離開關,以便日後檢修時直接切斷電源,避免每次均需進入假天花內操作。

若機型配備緊急停機端子或漏水偵測端子,應於安裝期間一併接駁完成。完成安裝後再行加裝,需重新拆開機身外殼,徒增施工時間及維修風險。

第五階段:風管系統

香港住宅多採用單一回風配合單一送風之簡易佈置。較大型單位或多區域空間,則需鋪設一對二或一對三之風管分支系統。須注意各機型之外靜壓上限:UTC 系列約為 30 Pa,GEC V 系列約為 60 至 80 Pa。每米風管、每個彎頭及每個風口均會消耗靜壓 — 若超出預算範圍,風量將顯著下降,連帶影響除濕效能。詳細計算方法請參閱本公司之風管設計指南。

第六階段:濕度感應器之安裝位置

感應器之安裝位置直接決定機身對室內濕度之判讀準確度,建議遵循以下原則:

• 安裝高度為距地面 1.5 米,須位於室內牆面,並處於人員主要活動範圍內
• 距離門口、窗戶及出風口至少 1 米
• 應避開陽光直接照射之位置
• 切勿置於櫃內或窗簾後方等空氣不流通之處

常見之安裝錯誤為:感應器設於浴室門口附近,沐浴後讀數長時間偏高,導致機身持續運轉而無法停機。將感應器移至客廳中央位置,此問題即可獲得解決。

第七階段:系統調試

安裝完成後須執行以下調試程序:

1. 設定濕度為 45% RH,連續運轉 30 分鐘,並前往排水終點確認確實有水流出
2. 使用風速計量度各送風口之風量,並與設計值進行比對核實
3. 以手提濕度計校驗壁掛式感應器之讀數,若偏差超過 3% RH 須予以校正
4. 測試緊急停機按鈕及漏水偵測端子之運作功能
5. 向用戶移交 WiFi App 或 BMS 之設定資料,並於隔離開關及檢修口位置張貼識別標籤

如閣下需要安排現場勘察或工程報價,歡迎填寫查詢表單,本公司將於一個工作天內與閣下聯絡。

1. Site survey

Before any quote, our engineer lifts a ceiling tile and measures four things directly:

• Clear plenum height — UTC needs 245 mm, GEC V needs 280 mm+, commercial GEC more
• Structural slab position for the 28–70 kg suspension load
• Drainage destination — bathroom floor trap, FCU condensate line, or kitchen drain
• Distance to 220 V supply and whether the consumer unit has a free 16 A circuit

The classic HK trap: drawings show 300 mm clear plenum, but sprinkler pipes and existing FCU refrigerant lines have eaten 80 mm. The real clearance is 220 mm. At that point we either downsize from UTC68 to the slimmer UTC20, or move the unit to a different location.

2. Suspension and vibration

Suspend the unit on M8 or M10 threaded rod anchored into the structural slab — never into the suspended ceiling frame. Add neoprene or spring isolators between the rod and the chassis. A compressor running 18 hours a day will telegraph noise into the flat below if it is hard-mounted.

Leave 50–100 mm clearance on all sides for service access. HK ceilings commonly use clip-fit aluminium grid tiles — designate an access panel directly under the unit's filter so future maintenance does not require dismantling.

3. Drainage

Every single-phase ceiling model (UTC, GEC V, GEC68LD-HP, GEC145LD-HP) has an integrated 1.8 m pump and a check valve built into the supplied drain hose. The correct routing is for the drain line to rise from the unit to a high point at or near the 1.8 m head limit, then fall by gravity to the discharge — using the full lift, then letting gravity carry the line the rest of the way.

Three-phase models (GEC280LD, GEC400LD, GEC550LD) have no pump. They drain by gravity only — the line must slope continuously downward from the unit with no rising section.

See our drainage guide for the full method and commissioning checks.

4. Power

UTC and smaller GEC V units run on 220 V single-phase 50 Hz from a dedicated 16 A circuit. GEC280 and above need 380 V three-phase, which for residential HK requires a CLP or HKE application. Fit a local isolator within sight of the unit so future maintenance can drop power without climbing back into the void.

Wire the emergency-stop and water-leak ports during install. They are five-minute jobs on day one and disruptive to add later.

5. Ducting

Most HK residential installs use a simple single-return / single-supply layout. Larger apartments and clubhouses need branched ducting. Watch the unit's external static pressure limit — UTC about 30 Pa, GEC V about 60–80 Pa. Every metre of duct, every bend, and every grille adds pressure loss. See our ducting design notes for the full calculation.

6. Humidity sensor placement

The sensor's location determines how the unit experiences the room:

• 1.5 m height, interior wall, occupied zone
• At least 1 m from any door, window, or vent
• Out of direct sunlight
• Not inside a cabinet or behind curtains

Common mistake: sensor next to the bathroom door reads shower humidity for hours and the unit never stops. Move it to the centre of the living room and the issue evaporates.

7. Commissioning

1. Run dehumidify at 45% RH setpoint for 30 minutes. Confirm water at the drain destination.
2. Measure airflow at every supply grille with an anemometer; compare against design CMH.
3. Verify the wall sensor against a hand-held hygrometer; recalibrate if drift exceeds 3% RH.
4. Cycle the emergency-stop and water-leak inputs.
5. Hand over WiFi App or BMS credentials and label the isolator and ceiling access panel.

For a site survey or project quote, drop us a brief and we will reply within a business day.